I'm using SendMessage() to activate a form's resize mode. My goal is to allow a borderless form to be resized via the mouse or keyboard.

SendMessage(hWindow, WM_SYSCOMMAND, SC_SIZE, [border constant???] )

My understanding of SC_SIZE is that I can specify an edge/border constant that will serve as the source of the resize activity, i.e. left edge, top edge, etc.

I've been googling for these constants without success.

Any suggestions?

Malcolm