Move or resize the windows of 3rd party programs with c#

Question

We have a C# base frame program here in the company, it is able to run C# codes. When it starts, it runs in full screen mode, besides we have more program that runs in parallel.

I would like to put our program to the left side, another program to the right side on the screen at startup.

How can I move or resize 3rd party program windows in C#?

Answer 1

You can do it with MoveWindow WinAPI function:

//Import:
[DllImport("user32.dll", SetLastError = true)]
internal static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

//Usage:
MoveWindow(ApplicationHandle, 600, 600, 600, 600, True);