API -> PostMessage [ Library : user32.dll, Category :

PostMessage

Library : user32.dll Category : _CategoryNotSet

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API Description :

The PostMessage function places (posts) a message in the message queue associated with the thread that created the specified window and then returns without waiting for the thread to process the message.

VB Declaration :

Show Multiline Public Private

Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVaL hwnd As Long, ByVaL wMsg As Long, ByVaL wParam As Long, ByVaL lParam As Long) As Long

Parameters :

· hWnd
Identifies the window whose window procedure is to receive the message. Two values have special meanings:
HWND_BROADCAST
 The message is posted to all top-level windows in the system, including disabled or invisible unowned windows, overlapped w

Return :

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

OS Requirement :

Requires Windows NT 3.1 or later
Requires Windows 95 or later

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