WinAPI: Create a window with a specified client area size

Question

I was wondering how can I create a window using Win32 API with a specific client area size.

When trying to create a window using the following piece of code, the entire window is 640x480, with the window's chrome taking some of the client area:

HWND       hWnd; WNDCLASSEX WndClsEx; ZeroMemory(&WndClsEx, sizeof(WNDCLASSEX));  WndClsEx.cbSize        = sizeof(WNDCLASSEX); WndClsEx.style         = CS_HREDRAW | CS_VREDRAW; WndClsEx.lpfnWndProc   = DefWindowProc; WndClsEx.cbClsExtra    = 0; WndClsEx.cbWndExtra    = 0; WndClsEx.hIcon         = LoadIcon(NULL, IDI_APPLICATION); WndClsEx.hCursor       = LoadCursor(NULL, IDC_ARROW); WndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); WndClsEx.lpszMenuName  = NULL; WndClsEx.lpszClassName = TEXT("Title"); WndClsEx.hInstance     = hInstance; WndClsEx.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);  RegisterClassEx(&WndClsEx);  hWnd = CreateWindowEx(  NULL,             TEXT("Title"),             TEXT("Title"),             WS_OVERLAPPEDWINDOW,             CW_USEDEFAULT,             CW_USEDEFAULT,             640,             480,             NULL,             NULL,             hInstance,             NULL); 

Assuming simple math won't quite solve the problem, how do I take the chrome size into account?

Note: I'm using SDL after creating the window, but I'm guessing it's bound to the window size and makes no difference to its size.

Answer 1

You can use the AdjustWindowRect or AdjustWindowRectEx function to calculate the window size given a desired client area size.