CAPTURECALLBACK Function

#include "l_bitmap.h"

L_INT pEXT_CALLBACK YourFunction (pBitmap, pCaptureInfo, pUserData)

pBITMAPHANDLE pBitmap;

pointer to the bitmap handle

pLEADCAPTUREINFO pCaptureInfo;

pointer to an info structure

L_VOID * pUserData;

pointer to additional parameters

Handles the output image data acquired by one of the image capture functions.

Parameter

Description

pBitmap

The pointer to the bitmap handle referencing the bitmap that contains the captured image.

pCaptureInfo

Pointer to a LEADCAPTUREINFO structure containing information about the source of the captured image.

pUserData

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 the calling function.)

 

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

Use this callback function to process captured image data when multiple captures are performed. Multiple captures can be done by setting the capture options using L_SetCaptureOption.

Required DLLs and Libraries

LTSCR

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_SetCaptureOption

Topics:

Support Functions: Callbacks

 

Implementing Screen Capture

Example

For an example, refer to L_CaptureArea.

Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
LEADTOOLS Screen Capture C API Help
Click or drag to resize