I find it ridiculous that it’s so hard to find any code snippet for this simple demand so here I’m going to write one. This code does one simple job: create a window with some specific client size.
const auto style = WS_OVERLAPPEDWINDOW;
const auto style_ex = 0;
RECT rect = { };
rect.right = /* your window width */;
rect.bottom = /* your window height */;
AdjustWindowRectEx(&rect, style, FALSE, style_ex);
hwnd = CreateWindowEx(
style_ex,
L"YOUR WINDOW CLASS",
L"YOUR WINDOW TITLE",
style,
// Size and position
CW_USEDEFAULT, CW_USEDEFAULT,
rect.right - rect.left, // Perform a subtraction to get the real size
rect.bottom - rect.top,
NULL, // Parent window
NULL, // Menu
hInstance, // Instance handle
NULL // Additional application data
);