C# How to pass the key combination Ctrl+A, Shift+A to another application?

Question

C++ / C#

In general, the essence of the question is clear, the code does not transmit combinations, but only separately pressed keys, i.e. Ctrl+A doesn't work here :(

SetActiveWindow(ptr);            
            PostMessage(ptr, WM_SYSKEYDOWN, (int)Keys.ControlKey, 0);
            PostMessage(ptr, WM_SYSKEYDOWN, (int)Keys.A, 0);
            PostMessage(ptr, WM_SYSKEYUP, (int)Keys.ControlKey, 0);
            PostMessage(ptr, WM_SYSKEYUP, (int)Keys.A, 0);

Answer 1

stackoverflow.com/questions/11384669/sending-right... - try as written here