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This function registers a window, which then receives software-based input panel notifications related to the current input method (IM).

The software-based input panel posts a WM_IM_INFO message to the window passed in the call to SipRegisterNotification.


BOOL SipRegisterNotification( 



[in] Handle of the window to receive software-based input panel notifications.

Return Value

TRUE indicates success. FALSE indicates failure. To get extended error information, call GetLastError.


Only one application can register a window to receive software-based input panel notifications. This registration remains in effect until the device is either cold or warm booted. The IM sends information, such as user input, to the software-based input panel, and the software-based input panel forwards that information to the window that hWndidentifies.

SipRegisterNotificationdoes not require that the software-based input panel environment be loaded in order to complete successfully. Therefore, a call to SipRegisterNotificationdoes not initialize the software-based input panel environment. The software-based input panel environment is initialized by the first function called that needs a loaded input environment. All software-based input panel functions initialize the software-based input panel environment except SipEnumIM, SipStatus, SipSetDefaultRect, and SipRegisterNotification.


Header sipapi.h
Library coredll.lib
Windows Embedded CE Windows CE 2.10 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also