Is there a way with the API functions to change the background color of a Window (or control) having only its Handle?

Not only the background color behind the text, rather all the window or control, and without changing the original content.

Something as:

System.Windows.Forms.Control ctrl;

ctrl.BackColor = Color.Red;

But, With API Functions.

Thanks, Deza

im not sure but wondering why you would rather use a "handle" or even some API to do this when you can do this, as you have shown, using the .NET Way? if there already exists a .NET way, you should really be using it :-)

There is no API that works for all types of windows.

The standard Windows Controls (Edit, List Box etc..) send WM_CTRLCOLOR notification messages to it's parent. By handling these type of messages, you can specify how the control gets drawn.

Because it is not my Application. I just have the Handle of the Window (Form) and the handle of a Control. I tried with

System.Windows.Form.Control ctrl;

ctrl.FromHandle(handle);

but It did not work.