WndProc is a .NET method that process Windows messages. It is the .NET equivalent of the C++ WindowProc method.
Official documentation including example.
For more information on how Windows messages are processed, can consult WindowProc.
Questions tagged [wndproc]
348 questions
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votes
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Which messages are processed by DefWindowProc?
is there any documentation which messages are processed by DefWindowProc, and how?
I recently stumbled over WM_SETFONT/WM_GETFONT not being handled, I'm not sure if there's a mistake in my code, or if that's expected behavior, so I tried the…
peterchen
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Winforms keypress and barcode scanner
I managed using bar-code scanner successfully in my WPF project using a keyboard hook as follows (I skip some details, but basically, I can rely on the fact that I know which keyboard is my scanner).
///
/// Add this KeyboardHook to a…
neggenbe
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Does the Message to WndProc change value from 32Bit OS to 64Bit OS?
When the following Method is overrided in .NET it seems that I get different Messages in 32Bit and 64Bit OS:es. Can this be true?
protected override void WndProc(ref Message m)
I want to catch the following: private const int WM_LBUTTONDBLCLK =…
Filip Ekberg
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.NET Modal Window On Top of VB6
We have a VB6 app that shows a .NET WPF modal Window (on the main VB6 thread).
It correctly blocks interaction with the VB6 UI, because the thread blocks at window.ShowDialog().
We also have a timer in VB6. Since the timer ticks on the main thread…
Jeff
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Windows Message for all resizing actions
Does someone know a message that gets send at the end of a resizing event (like double clicking app bar, maximize button click, drag to the top of the screen, ...), a good example is WM_EXITSIZEMOVE, but it's only at the end of the dragging of the…
Rakete1111
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How to use this WndProc in Windows Forms application?
Please guide me how to use this WndProc in Windows Forms application:
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (msg == NativeCalls.APIAttach && (uint)lParam ==…
Thomas
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Multiple device inserted notifications
Can anyone tell me why when using the following code I receive multiple (three or four device arrival notifications)?
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
Const WM_DEVICECHANGE As Integer = &H219
Const…
thehoten
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Finding WndProc Address
How can I find the address of a WndProc (of a window of another process). Even if I inject a DLL and try to find it with either GetClassInfoEx() or GetWindowLong() or GetWindowLongPtr() I always get values like 0xffff08ed, which is definitely not an…
Adam
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How to handle WM_SETCURSOR in C#
In my media player application, I hid the cursor using SetCursor(NULL) and to make sure that Windows does not reset the cursor state, I handled WM_SETCURSOR in my WndProc method.
protected override void WndProc(ref Message m)
{
switch (m.Msg)
…
godly-devotion
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How do I send/receive windows messages between VB6 and c#?
I know I can receive messages with the code below in c#, how do I send to vb6, and receive in vb6, and send from vb6?
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
…
cabgef
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6 answers
Disable maximizing WPF window on double click on the caption
How to disable maximizing WPF window on double click on the caption and leave resizing available?
I know that ResizeMode disables maximizing, but it also prevents resizing the form
ResizeMode="CanMinimize"
I know how to remove maximize and…
Alex Klaus
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Capture mouse touch the title bar of win form
i got some trick to capture mouse touch title bar but the routine fire repeatedly when i place mouse on title bar. here is the routine
protected override void WndProc(ref Message m)
{
if (m.Msg == 0xA0) // WM_NCMOUSEMOVE
{
…
Thomas
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how to route a message to the control's standard WNDPROC
When a standard window control (e.g. an "EDIT" control) is created, its WNDPROC is defined as part of the window class (i.e. "EDIT" has a specific WNDPROC that is designed to make the window display & behave as an edit-control).
MFC allows you to…
Mordachai
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WebBrowser control: how to suppress message: do you want to close this window
I'm new to WebBrowser control. In the current project, we use WebBrowser control to integrate with existing project. All popup windows are displayed in a new windows form. When "javascript window:close" is called on the popup window, the IE instance…
Keping
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Winforms - WM_NCHITEST message for click on control
I have a simple windows form with no border and several label controls (nothing that needs to be clicked). I needed to be able to allow the user to move the form by clicking anywhere on it, so I found this question, and used the following code found…
Mansfield
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