Open On-Screen Keyboard Programmatically in Windows

osk-programmatic.cpp

#include <Windows.h>

int main()
{
	INPUT input[3];
	input[0].type = INPUT_KEYBOARD;
	input[0].ki.wScan = 0;
	input[0].ki.time = 0;
	input[0].ki.dwExtraInfo = 0;
	input[0].ki.wVk = 0x11;
	input[0].ki.dwFlags = 0;

	input[1].type = INPUT_KEYBOARD;
	input[1].ki.wScan = 0;
	input[1].ki.time = 0;
	input[1].ki.dwExtraInfo = 0;
	input[1].ki.wVk = 0x5B;
	input[1].ki.dwFlags = 0;

	input[2].type = INPUT_KEYBOARD;
	input[2].ki.wScan = 0;
	input[2].ki.time = 0;
	input[2].ki.dwExtraInfo = 0;
	input[2].ki.wVk = 0x4F;
	input[2].ki.dwFlags = 0;

	SendInput(3, input, sizeof(INPUT));

	input[0].ki.dwFlags = KEYEVENTF_KEYUP;
	input[1].ki.dwFlags = KEYEVENTF_KEYUP;
	input[2].ki.dwFlags = KEYEVENTF_KEYUP;

	SendInput(3, input, sizeof(INPUT));

	return 0;
}