I'm developing a simple remote control app. To command the remote PC I use some simple API call: SetCursoPos(x,y) to set Cursor position. WindowFromPoint(x,y) to get the handle of the Window under the screen coordinates x,y. Then I send messages like WM_LBUTTONDOWn and WM_LBUTTONUp to command the window, this works, but I have a problem to open the menu bar of the remote winodw. I know that when the cusror is over the non client area of window I must send the message WM_NCLBUTTONDOWN, and this is what I do, but it doesn't , works! When the cursor is over the window menu bar and I send WM_NCLBUTTONDOWN, I expect that the Menu is opened, but it doesn't. Using SPY I knwo that this is the message that is sent to the window when you press the left mouse button over the nonclient area of the window ( the menu bar ). Any idea about what I must do to in this situation ?