WM_CREATE
The WM_CREATE
message is sent when an application requests that a window be created by
calling the CreateWindowEx
or CreateWindow
function. The window procedure of the new window receives this message after
the window is created, but before the window becomes visible. The message is
sent before the CreateWindowEx or CreateWindow function returns.
WM_CREATE
lpcs = (LPCREATESTRUCT) lParam; // structure with
creation data
Parameters
lParam
Value of lParam.
Points to a CREATESTRUCT
structure that contains information about the window being created. The members
of CREATESTRUCT are identical to the parameters of the CreateWindowEx
function.
Return Values
If an
application processes this message, it should return 0 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.
See Also