The WM_CREATE message is sent when an application requests that a window be created by calling the CreateWindowEx or CreateWindow function. (The message is sent before the function returns.) The window procedure of the new window receives this message after the window is created, but before the window becomes visible.
A window receives this message through its WindowProc function.
Syntax
WM_CREATE
WPARAM wParam
LPARAM lParam;
Parameters
- wParam
-
This parameter is not used.
- lParam
-
Pointer to a CREATESTRUCT structure that contains information about the window being created.
Return Value
If an application processes this message, it should return zero to continue creation of the window. If the application returns 1, the window is destroyed and the CreateWindowEx or CreateWindow function returns a NULL handle.
Notification Requirements
| Minimum DLL Version |
None |
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| Header | Declared in Winuser.h, include Windows.h |
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| Minimum operating systems |
Windows 95, Windows NT 3.1 |
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See Also