An application sends a BM_CLICK message to simulate the user clicking a button. This message causes the button to receive a WM_LBUTTONDOWN and a WM_LBUTTONUP message, and the button's parent window to receive a BN_CLICKED notification message.
BM_CLICK
wParam = 0; // not used; must be zero
lParam = 0; // not used; must be zero
Parameters
This message has no parameters.
Return Values
This message does not return a value.
See Also