I'm trying to use nircmdc to send a keypress to a background process (without bringing it to front).
More precisely, i'm tring to send Ctrl+Shift+S to notepad++.exe:
nircmdc win postmsg process notepad++.exe WM_KEYDOWN VK_CTRL 0
nircmdc win postmsg process notepad++.exe WM_KEYDOWN VK_SHIFT 0x40000000
nircmdc win postmsg process notepad++.exe WM_KEYDOWN VK_S 0x40000000