Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
1,984 questions with Developer technologies | Windows Forms tags
1 answer
how to create Bitmap from Array?
I have array of int or Color how to create bitmap? if the bitmap width = 48 and height=12 then the array is Color line 1 48 colors line 2 48 colors ..... how to create it to Bitmap?
Developer technologies | Windows Forms
asked 2026-05-08T13:45:07.8733333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(310.4, 2%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
mc
6,921
Reputation points
answered 2026-05-08T13:45:17.0833333+00:00
Q&A Assist
2 answers
One of the answers was accepted by the question author.
Existing Form objects will not load into the Form View
Failed to launch the design tools server process. The objects on a form such as "Buttons", "Labels", Grid objects, etc. will not load as graphics-viewable objects even though they have coded versions.
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-05-07T01:28:12.98+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 64%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETH%3C/text%3E%3C/svg%3E)
Thomas Holderread
25
Reputation points
edited an answer 2026-05-07T06:57:26.25+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(118.4, 21%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENV%3C/text%3E%3C/svg%3E)
Nancy Vo (WICLOUD CORPORATION)
3,630
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
updated and will not show designers
I updated and now none of my design forms will display. One error message is The designer could not be shown for this file because none of he classes within it can be designed. Another says "The type 'System.Configuration.ApplicationScoped…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-05-01T20:52:33.9433333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(300.8, 10%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJO%3C/text%3E%3C/svg%3E)
Jay O'Brien
20
Reputation points
commented 2026-05-07T02:15:55.6966667+00:00
Nancy Vo (WICLOUD CORPORATION)
3,630
Reputation points Microsoft External Staff
Moderator
3 answers
Smart App Control blocks WinForms / WPF sample applications from running
When Smart App Control is enabled on Windows, I am unable to run WinForms or WPF sample applications from Microsoft Visual Studio. After enabling Smart App Control and attempting to run the project, Visual Studio shows the following error. Smart App…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-27T06:20:47.45+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 77%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYM%3C/text%3E%3C/svg%3E)
Yuvaraj Masilamani
0
Reputation points
commented 2026-05-04T06:35:39.92+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 1%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJD%3C/text%3E%3C/svg%3E)
Jack Dang (WICLOUD CORPORATION)
17,585
Reputation points Microsoft External Staff
Moderator
3 answers
How to fix this window form issue?
why is the window form not showing after I reopen the project?
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-25T12:16:28.96+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(54.400000000000006, 43%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECE%3C/text%3E%3C/svg%3E)
Chheng E Yeoum
0
Reputation points
commented 2026-04-30T06:34:47.4466667+00:00
Nancy Vo (WICLOUD CORPORATION)
3,630
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
Property accessor ConnectionStringObject error in Winforms C# project
I am doing a Winforms project, c#, and suddenly, I started getting this error.... Does someone have an idea how to fix this?
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-28T11:22:03.0833333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 95%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECD%3C/text%3E%3C/svg%3E)
Christopher Durieu
20
Reputation points
accepted 2026-04-29T15:14:27.8466667+00:00
Christopher Durieu
20
Reputation points
2 answers
One of the answers was accepted by the question author.
Embedding Notepad++ in WinForms using SetParent does not dock (opens as separate window on Windows 11 local machine)
We are developing a WinForms application where I need to host Notepad++ inside my application UI as a docked child window. This is done launching Notepad++ and using Win32 APIs like SetParent to reparent its main window into a container control (e.g., an…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-22T12:57:53.8233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(182.40000000000003, 84%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ER%3C/text%3E%3C/svg%3E)
Researcher
76
Reputation points
accepted 2026-04-29T06:40:06.91+00:00
Researcher
76
Reputation points
5 answers
How to build an install package without Visual Studio?
Hello! I created a Windows Form Desktop app with Visual Studio. Normally, I just copy the EXE file to the target machine and it Just Works; however, it is not working in one particular case. I know that it is most like l missing a dependence. Typical fix…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 51%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ES%3C/text%3E%3C/svg%3E)
2 answers
wich nugets I have to install for report viewer in visual studio vb.net?
I just install visual studio and I want to make reports y download Microsoft RDLC Report Designer and Repor Viewer core winforms, but When i want to drag a tool Report Vierer to a form Iit can be place in the form
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-17T22:37:37.35+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 73%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJD%3C/text%3E%3C/svg%3E)
jose de jesus sanchez
0
Reputation points
commented 2026-04-24T02:35:41.3966667+00:00
Nancy Vo (WICLOUD CORPORATION)
3,630
Reputation points Microsoft External Staff
Moderator
2 answers
how to fix error on windows form if theres no link to show me where i must fix or adjust my code
how to fix error on windows form if theres no link to show me where i must fix or adjust my codev
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-04-17T20:40:45.69+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(240, 86%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAN%3C/text%3E%3C/svg%3E)
A Nodali (25007422)
0
Reputation points
commented 2026-04-24T02:34:15.24+00:00
Nancy Vo (WICLOUD CORPORATION)
3,630
Reputation points Microsoft External Staff
Moderator
1 answer
How can I prevent the DataGridView header column from being highlighted when a row is selected
I am using Visual Studio 17.5.4 and building a Windows Forms app with a DataGridView as a list of items to select then populate the form fields. All this works but I have a nagging problem to overcome. When you select a row from the grid, it will…
Developer technologies | C#
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
11,802 questions
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2023-04-24T13:29:00.0566667+00:00
Pat Hanks
141
Reputation points
commented 2026-04-22T21:00:03.1633333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 81%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAC%3C/text%3E%3C/svg%3E)
Art Chadbourne
0
Reputation points
5 answers
Windows Forms Application Icon suddenly shows as default icon or does not update color after KB5051989 update
Hi, Our C# Windows Forms Application icon (in the taskbar) suddenly shows as default icon or sometimes doesn't update its color (based on the customization) after installing the KB5051989 update. This has been working for 15 years, and the issue just…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2025-03-06T08:36:12.63+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(41.6, 12%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEG%3C/text%3E%3C/svg%3E)
Emmanuel Guballa
25
Reputation points
answered 2026-04-17T19:19:31.16+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(121.6, 63%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDN%3C/text%3E%3C/svg%3E)
Dániel Kékesi
0
Reputation points
2 answers
Can I legally modify the method if there is a text which indicates to not modify it, in Windows Forms App?
Hello, When I create Windows Forms App project, and I add a button into the form, in the Form1.Designer.cs there is a text /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-03-27T16:00:33.0966667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(16, 49%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERB%3C/text%3E%3C/svg%3E)
Rustam Balushka
0
Reputation points
commented 2026-04-03T10:49:06.64+00:00
Jack Dang (WICLOUD CORPORATION)
17,585
Reputation points Microsoft External Staff
Moderator
1 answer
WinForm in Visual Studio 2026 - changing name of a control causes designer to fail
Just migrated to VS 2026. When creating a new form, there is no issues and controls can be added fine. However, when you change the name of a control, the designer throws a wobbly as not all references are renamed in the designer code. I need to…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 64%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELI%3C/text%3E%3C/svg%3E)
3 answers
One of the answers was accepted by the question author.
what is button in winform is that in win32?
is that button in winform is equal to button in win32? maybe not I use SendMessage in winform to send SETTEXT message to the handle of the button but the text is not changed.
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-03-20T07:23:35.7966667+00:00
mc
6,921
Reputation points
commented 2026-03-23T07:35:49.96+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 18%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETL%3C/text%3E%3C/svg%3E)
Taki Ly (WICLOUD CORPORATION)
1,260
Reputation points Microsoft External Staff
Moderator
3 answers
One of the answers was accepted by the question author.
how to load 3d in winform?
I want to ask that how to load 3d in winform. can I only load one 3d in one control? So I can click it.
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
1 answer
One of the answers was accepted by the question author.
The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine
I am having Windows 64 Bit os build 19043.1826 21H1, i have office 21 64 bit on this pc, but when i want to open an xls file i am getting the above error, if i build application 32bit it open file correctly, but if i make it 64 bit i can not install…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2022-07-25T18:21:25.197+00:00
Sushil Agarwal
406
Reputation points
commented 2026-03-17T08:12:20.3466667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(121.6, 96%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETM%3C/text%3E%3C/svg%3E)
Thakur Manjeet Singh
0
Reputation points
2 answers
Error for Designer Form on VS
--------Instances of this error (1)--------Instances of this error (1)1.Hide Call Stack1.Hide Call Stackat System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.EnsureDocument(IDesignerSerializationManager manager) at…
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-03-07T22:05:06.6166667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 57.99999999999999%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHJ%3C/text%3E%3C/svg%3E)
Hostal, John Joseph
0
Reputation points
commented 2026-03-16T09:33:45.12+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 62%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETT%3C/text%3E%3C/svg%3E)
Tom Tran (WICLOUD CORPORATION)
4,860
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
visual studio community new forms project cannot open designer
When I create a new windows forms project the designer cannot open.
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2026-02-28T17:33:52.3033333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 34%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERW%3C/text%3E%3C/svg%3E)
Robert Wirtz
20
Reputation points
accepted 2026-02-28T17:39:13.4233333+00:00
Robert Wirtz
20
Reputation points
8 answers
Windows Forms Designer Problem When Renaming New Form Before Adding Controls
Note: I have reported the problem below in Visual Studio 2022 Feedback. Just wanted to see if any of you have a suggestion. Normally, when you create a new Form in Windows Forms and add controls to the form, the Designer automatically fills in the…
Developer technologies | Visual Studio | Other
Developer technologies | Visual Studio | Other
A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
5,751 questions
Developer technologies | Windows Forms
Developer technologies | Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
1,984 questions
asked 2022-09-14T20:22:54.647+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 28.000000000000004%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENP%3C/text%3E%3C/svg%3E)
Nicholas Piazza
546
Reputation points
answered 2026-01-29T21:16:34.46+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 17%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDS%3C/text%3E%3C/svg%3E)
Dustin Scholl
0
Reputation points