POSTMESSAGERAPID-Q SpecificWindows

A WinAPI call to PostMessage, does not block.

Syntax: POSTMESSAGE hWnd, uMsg, wParam, lParam
POSTMESSAGE Form.Handle, WM_SYSCOMMAND, SC_MINIMIZE, 0

Details:
PostMessage is a WinAPI call so instead of filling this entire page with information you can look up this function in your WinAPI manual/help file.