Home/ Questions/Q 6747463
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T12:26:42+00:00

I have created a window in C# by win api. And made it as

  • 0

I have created a window in C# by win api. And made it as child to another window. This parent window is an external program and I don’t know its source code.

When i move my window inside parent window some parent’s elements draw itself on my window.

For, better understanding i’ve made some screens.

This is before I move my window. My window is gray.

enter image description here

And this one is after moving my window over the "SeatOpen" button.

enter image description here

I have no idea how parent window can draw on my window.
So, why this is happening and how to fix?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The parent window is not drawing on your window… you are failing to draw on your window yourself — your window is not responding to WM_PAINT messages for some reason so whatever garbage was on the screen remains there.

    • 0