L_DispContainerSetAnnotationCallBack

#include "l_bitmap.h"

L_LTIVW_API L_INT EXT_FUNCTION L_DispContainerSetAnnotationCallBack(hCon, pfnCallBack, pUserData)

HDISPCONTAINER hCon;	/* handle to the container */
DISPCONTAINERANNOTATIONCALLBACK pfnCallBack;	/* callback function */
L_VOID * pUserData;	/* pointer to more parameters for the callback */

Sets a callback function, which occurs every time the user clicks on an annotation object.

Parameter	Description
hCon	Handle to the Container.
pfnCallBack	Callback function that is called every time the user clicks on an annotation object. The callback function must adhere to the function prototype described in DISPCONTAINERANNOTATIONCALLBACK.
pUserData	Void pointer that you can use to pass one or more additional parameters that the callback function needs. To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID . The callback function, which receives the address in its own pUserData* parameter, can cast it to a pointer of the appropriate data type to access your variable or structure.
	If the additional parameters are not needed, you can pass NULL in this parameter.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

To get the current callback function used to handle mouse events, call the L_DispContainerGetAnnotationCallBack

Required DLLs and Libraries

LTIVW
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:	L_DispContainerGetAnnotationContainer, L_DispContainerRotateAnnotationContainer, L_DispContainerSetAnnotationContainer, L_DispContainerAnnToRgn, L_DispContainerGetSelectedAnnotationAttributes, L_DispContainerGetAnnotationCallBack, L_DispContainerGetAnnotationCreatedCallBack, L_DispContainerSetAnnotationCreatedCallBack, DISPCONTAINERANNOTATIONCALLBACK, DISPCONTAINERANNOTATIONCREATEDCALLBACK
Topics:	Image Viewer Cells
	Image Viewer Functions: Working with Annotations

Example