Win32 : 无标题栏, 可改变大小的窗口

改变窗口的Style

1. 无标题栏

2. 可改变大小

HWND hwnd = this->m_hWnd;
int index = GWL_STYLE;

// read existing value
LONG styleValue = ::GetWindowLong(hwnd, index);

// change
styleValue &= ~WS_CAPTION;

// take effect
::SetWindowLong(hwnd, GWL_STYLE, styleValue);
::SetWindowPos(hwnd, NULL, 0, 0, 0, 0, SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE);