PostMessage - CTRL-P

I want to send CTRL-P to other process without setting focus to it using PostMessage. I am using following code:
const int VK_Control = 0x11;
const int VK_P = 0x50;
PostMessage(hWnd, WM_KEYDOWN, VK_CONTROL, 0);
PostMessage(hWnd, WM_KEYDOWN, VK_P, 0);
PostMessage(hWnd, WM_KEYUP, VK_P, 0);
PostMessage(hWnd, WM_KEYUP, VK_CONTROL, 0);
But its not working.

Please help me, thanks!
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that's not how you should send the ctrl-p message.

you should send only 2 messages (keydown and keyup with the control flag set (inside LPARAM - which you are currently sending as 0).
see this links on msdn:


basically this is what you should do (but you have to fill in all the details):
PostMessage(hWnd, WM_KEYDOWN, VK_P, <fill in LPARAM here>);
PostMessage(hWnd, WM_KEYUP, VK_P, <fill in LPARAM here>);



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