L_CaptureFromEXEDlg

L_CaptureFromExeDlg

#include "l_bitmap.h"

L_LTSCR_API L_INT L_CaptureFromExeDlg(pBitmap, uBitmapStructSize, pszFileName, pTransparentColor, nResType, nDialogType, uFlags, pCaptureInfo, uInfoStructSize, pfnCaptureCallback, pUserData, pfnCallBack, pHlpUserData)

pBITMAPHANDLE pBitmap;	/* pointer to the bitmap handle */
L_UINT uBitmapStructSize;	/* size in bytes, of the structure pointed to by pBitmap */
L_TCHAR * pszFileName;	/* filename to capture from */
LPCOLORREF pTransparentColor;	/* pointer to a color */
L_INT nResType;	/* resource type to be captured. */
L_INT nDialogType;	/* type of dialog to be displayed */
L_UINT uFlags;	/* flags */
pLEADCAPTUREINFO pCaptureInfo;	/* pointer to info structure */
L_UINT uInfoStructSize;	/* size in bytes, of the structure pointed to by pCaptureInfo */
CAPTURECALLBACK pfnCaptureCallback;	/* optional callback function */
L_VOID * pUserData;	/* pointer to more parameters for the callback */
LTSCRHELPCB pfnCallBack;	/* optional help callback function */
L_VOID * pHlpUserData;	/* pointer to more parameters for the help callback */

Displays a dialog and captures an image from a resource stored in an EXE or DLL.

Parameter	Description
pBitmap	Pointer to a bitmap handle that references the captured data.
uBitmapStructSize	Size in bytes, of the structure pointed to by pBitmap, for versioning. Use sizeof(BITMAPHANDLE).
pszFileName	Character string containing the name of the exe (or dll) from which the resource should be captured.
pTransparentColor	Pointer to a color to be used in place of the transparent color of an Icon or Cursor.
nResType	Specifies the type of resource to capture. Possible values for RETYPEENUM are:
	Value	Meaning
	RESTYPE_BITMAP	Capture a bitmap
	RESTYPE_ICON	Capture an icon
	RESTYPE_CURSOR	Capture a cursor

nDialogType	Type of dialog to be displayed. Possible values are:
	Value		Meaning
	LTCAPDLG_TREEVIEW		Display tree dialog
	LTCAPDLG_TABVIEW		Display tab view
uFlags	Flags that determine the options dialog. Possible values are:
	Value	Meaning
	NONE	[0x0000] No "?" help button will be shown.
	SCRDLG_CAPTUREFROMEXE_CONTEXTHELP	[0x0008] Capture from exe options dialog context help. The "?" button will appear in the title bar if the pfnCallBack is not NULL.
pCaptureInfo	Address of LEADCAPTUREINFO structure to be filled with information regarding the captured image's source. Pass NULL if you are not interested in extra information about the capture.
uInfoStructSize	Size in bytes, of the structure pointed to by pCaptureInfo, for versioning. Use sizeof(LEADCAPTUREINFO).
pfnCaptureCallback	Optional callback function for additional processing.
	If you do not provide a callback function, use NULL as the value of this parameter.
	If you do provide a callback function, use the function pointer as the value of this parameter.
	The callback function must adhere to the function prototype described in CAPTURECALLBACK Function.
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.
pfnCallBack	Optional help callback function for displaying help dialog. If you do not provide a help callback function, use NULL as the value of this parameter. If you do provide a help callback function, use the function pointer as the value of this parameter. The callback function must adhere to the function prototype described in LTSCRHELPCB Function.
pHlpUserData	Void pointer that you can use to pass one or more additional parameters that the help 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 pHlpUserData 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

This function displays a dialog box that allows the user to select a resource from which a captured image should be made. The callback can be used to do multiple captures, depending on the options set using L_SetCaptureOption.

The captured bitmap may or may not have a region, depending on the transparency information of the captured resource.

If a help callback function was provided in pfnCallback, a Help button will appear on the dialog. If NULL was provided, no Help button will appear.

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, L_SetCaptureOptionDlg, CAPTURECALLBACK, L_StopCapture, LTSCRHELPCB Function
Topics:	Screen Capture C DLL Function Groups: Capture Functions
	Implementing Screen Capture

Example

L_INT EXT_CALLBACK pfnCaptureCallback(pBITMAPHANDLE    pBitmap,
                                      pLEADCAPTUREINFO pCaptureInfo,
                                      L_VOID         * pUserData)
{
   UNREFERENCED_PARAMETER(pCaptureInfo);
   UNREFERENCED_PARAMETER(pUserData);

   /* save the captured image */
   return(L_SaveBitmap (TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Images\\FromExeDlg.bmp"), pBitmap, FILE_BMP, 0, 0, NULL));
}

L_INT CaptureFromEXEDlgExample(L_VOID)
{
   BITMAPHANDLE    Bitmap;
   COLORREF        TransparentColor;
   LEADCAPTUREINFO CaptureInfo;

   memset(&CaptureInfo, 0, sizeof(LEADCAPTUREINFO));

   /*To call the L_CaptureFromExeDlg Tree*/
   TransparentColor = RGB(0, 0, 0);
   L_INT nRet = L_CaptureFromExeDlg(&Bitmap, sizeof(BITMAPHANDLE), 
                                     NULL,
                                     &TransparentColor,
                                     RESTYPE_BITMAP | RESTYPE_ICON | RESTYPE_CURSOR,
                                     LTCAPDLG_TREEVIEW,0,
                                     &CaptureInfo, sizeof(LEADCAPTUREINFO),
                                     pfnCaptureCallback,
                                     NULL, NULL, NULL);

   if (Bitmap.Flags.Allocated)
      L_FreeBitmap (&Bitmap);
   return nRet;
}