Double pixel size of a window?

Question

Is there a way to double the pixel size of a window, and only that window, that draws to the screen using GDI?

Answer 1

Do you mean:

• Change the DPI of the window? The answer is no.
• Change the dimensions of the window? The answer is yes via GetWindowPos/SetWindowPos.
• Zoom the window? Not unless you're using Direct2D/DirectX (in which case you can use a shader). You have to do this yourself.