What is the difference between wndclass and wndclassex

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A color value must be one of the following standard system colors the value 1 must be added to the chosen color. When this member is NULL , an application must paint its own background whenever it is requested to paint in its client area. Pointer to a null-terminated character string that specifies the resource name of the class menu, as the name appears in the resource file.

If this member is NULL , windows belonging to this class have no default menu. A pointer to a null-terminated string or is an atom.

If this parameter is an atom, it must be a class atom created by a previous call to the RegisterClass or RegisterClassEx function. The atom must be in the low-order word of lpszClassName ; the high-order word must be zero.

If lpszClassName is a string, it specifies the window class name. The class name can be any name registered with RegisterClass or RegisterClassEx , or any of the predefined control-class names. The maximum length for lpszClassName is A handle to a small icon that is associated with the window class.

If this member is NULL , the system searches the icon resource specified by the hIcon member for an icon of the appropriate size to use as the small icon.

The winuser. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors.

For more information, see Conventions for Function Prototypes. Window Classes. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 7 years, 10 months ago. Active 7 years, 10 months ago. Viewed times. Improve this question. Stradigos Stradigos 11 11 silver badges 25 25 bronze badges. See msdn. Brilliant, thanks a ton.