GetAsyncKeyStatus()

GetAsyncKeyStatus()

SHORT GetAsyncKeyStatus( int vkey )

https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getasynckeystate

return value

msb : 1 down 0 up

lsb : 1 changed from last call

VKEY

VK_MENU 0x12

https://docs.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes