Method WndUtil.RegisterWindowClass

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Overload

Registers new window class in this process.

public static void RegisterWindowClass(string className, WNDPROC wndProc = null, RWCEtc etc = null)

Parameters

className  (string) Class name.

wndProc  (WNDPROC) Delegate of a window procedure. See Window Procedures. Use null when you need a different delegate (method or target object) for each window instance; create windows with WndUtil.CreateWindow or WndUtil.CreateMessageOnlyWindow. If not null, it must be a static named method; create windows with any other function, including API CreateWindowEx.

etc  (RWCEtc) Can be used to specify API WNDCLASSEX fields. To set cursor use field mCursor (standard cursor) or hCursor (native handle of a custom cursor). If null, this function sets arrow cursor and style CS_VREDRAW | CS_HREDRAW.

Exceptions

ArgumentException wndProc is an instance method. Must be static method or null. If need instance method, use null here and pass wndProc to WndUtil.CreateWindow.

InvalidOperationException The class already registered with this function and different wndProc (another method or another target object).

Win32Exception Failed, for example if the class already exists and was registered not with this function.

Remarks

Calls API RegisterClassEx. The window class is registered until this process ends. Don't need to unregister. If called next time for the same window class, does nothing if wndProc is equal to the previous (or both null). Then ignores etc. Throws exception if different. Thread-safe. Protects the wndProc delegate from GC.