在 Windows8 里重映射 <Ctrl-Space> 快捷键以实现切换输入法功能。设置开机自动启动即可。

hack-IME.cpp

#include <Windows.h>
#include <Winuser.h>

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
	_In_opt_ HINSTANCE hPrevInstance,
	_In_ LPTSTR    lpCmdLine,
	_In_ int       nCmdShow) {

	RegisterHotKey(NULL, 1, MOD_CONTROL, VK_SPACE);

	MSG msg;

	while (GetMessage(&msg, NULL, 0, 0) != 0) {

		if (msg.message == WM_HOTKEY) {

			keybd_event(VK_LWIN, 0, KEYEVENTF_EXTENDEDKEY, 0);
			keybd_event(VK_SPACE, 0, KEYEVENTF_EXTENDEDKEY, 0);

			keybd_event(VK_LWIN, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
			keybd_event(VK_SPACE, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
		} else {

			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}

	}

	return (int) msg.wParam;
}