[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Ansi)]
public static extern IntPtr CreateWindowExA(uint dwExStyle,
string lpClassName,
string lpWindowName,
uint dwStyle,
int x,
int y,
int nWidth,
int nHeight,
IntPtr hWndParent,
IntPtr hMenu,
IntPtr hInstance,
IntPtr lpParam
);