DISPCONTAINERTAGCALLBACK Callback Function

#include "ltivw.h"

L_INT pEXT_CALLBACK YourFunction(hCellWnd, nCellIndex, hDC, lpRect, pUserData)

L_HWND hCellWnd;

handle to the cell window

L_INT nCellIndex;

index of the cell that called the callback

HDC hDC;

memory DC for painting

RECT * lpRect;

pointer to a structure

L_VOID * pUserData;

user data

This callback function is called before the window control paints a cell that contains an owner draw tag.

Parameter

Description

hCellWnd

A handle to the window that represents the Medical Viewer Cell.

nCellIndex

Index of the cell, which has the owner draw tag.

hDC

Memory DC that is used to paint the cell.

lpRect

Pointer to a RECT structure that contains the area of the owner draw tag in the Memory DC.

pUserData

A void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of L_DispContainerSetTagCallBack.) Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

When the window control paints a cell that contains an "owner draw" tag, this callback function is called to allow the user to draw a custom tag. This callback function is only called however, if it has been set by calling L_DispContainerSetTagCallback.

To get the current callback function used to draw custom tags, 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.

Help Version 19.0.2017.10.18
Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
LEADTOOLS Medical Image Viewer C API Help