Added VK_SNAPSHOT to accessible keycodes on Windows.

Printscreen.

Author: octalmage

src/keycode.h

@@ -123,7 +123,8 @@ enum _MMKeyCode {
 	K_SHIFT = VK_SHIFT,
 	K_ALT = VK_MENU,
 	K_CAPSLOCK = VK_CAPITAL,
-	K_SPACE = VK_SPACE
+	K_SPACE = VK_SPACE,
+	K_PRINTSCREEN = VK_SNAPSHOT
 };
 
 typedef int MMKeyCode;