/// <summary>
/// Retrieves information about a window class,
/// including a handle to the small icon associated with the window class.
/// </summary>
/// <param name="instance">
/// A handle to the instance of the application that created the class.
/// To retrieve information about classes defined by the system (such as buttons or list boxes),
/// set this parameter to <see cref="IntPtr.Zero"/>.
/// </param>
/// <param name="classAtom">
/// A class atom created by a previous call to RegisterClass
/// or <see cref="RegisterClassEx(ref ExtendedWindowClass)"/>.
/// </param>
/// <param name="extendedWindowStyle">
/// A pointer to a <see cref="ExtendedWindowClass"/> structure
/// that receives the information about the class.
/// </param>
/// <returns>
/// If the function finds a matching class and successfully copies the data, the return value is
/// true.<para/>
/// If the function does not find a matching class and successfully copy the data, the return value is
/// false. To get extended error information, call <see cref="Marshal.GetLastWin32Error"/>.
/// </returns>
public static bool GetClassInfoEx
(
[In] IntPtr instance,
[In] ushort classAtom,
[Out] out ExtendedWindowClass extendedWindowStyle
)
{
return(GetClassInfoEx(instance, new IntPtr(classAtom), out extendedWindowStyle));
}
public static extern bool GetClassInfoEx
(
[In] IntPtr instance,
[In] IntPtr className,
[Out] out ExtendedWindowClass extendedWindowClass
);
public static extern ushort RegisterClassEx([In] ref ExtendedWindowClass extendedWindowClass);