L_DispContainerSetTagCallBack

#include "ltivw.h"

L_LTIVW_API L_INT L_DispContainerSetTagCallBack(hCon, pfnCallBack, pUserData);

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

Sets a callback function, which lets the user provide and draw custom tags.

Parameter	Description
hCon	Handle to the container.
pfnCallBack	Callback function, which will be called every time the cell, needs to be repainted if the cell contains a custom (ownder draw) tag.
	The callback function must adhere to the function prototype described in DISPCONTAINERTAGCALLBACK.
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 tag callback function, call L_DispContainerGetTagCallBack.

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_DispContainerGetTagCallBack, L_DispContainerGetActionCallBack, L_DispContainerSetActionCallBack, DISPCONTAINERTAGCALLBACK, DISPCONTAINERACTIONCALLBACK
Topics:	Image Viewer Cells
	Image Viewer Functions: Image Viewer Cells

Example