L_CaptureFromEXE

L_CaptureFromExe

#include "l_bitmap.h"

L_LTSCR_API L_INT L_CaptureFromExe(pBitmap, uBitmapStructSize, pszFileName, nResType, pResID, bCaptureByIndex, clrBackGnd, pfnCaptureCallback, pUserData)

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 */
L_INT nResType;	/* resource type to capture */
L_TCHAR *pResID;	/* resource ID to be captured*/
L_BOOL bCaptureByIndex;	/* flag */
COLORREF clrBackGnd;	/* background color to be used for icons.*/
CAPTURECALLBACK pfnCaptureCallback;	/* optional callback function */
L_VOID * pUserData;	/* pointer to more parameters for the callback */

Captures an image from the specified 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.
nResType	Specifies the type of resource to capture. Possible values for RETYPEENUM are:
	Value	Meaning
	RESTYPE_BITMAP	Capture a bitmap resource
	RESTYPE_ICON	Capture an icon resource
	RESTYPE_CURSOR	Capture a cursor resource

pResID	Specifies the index of the resource to capture. You can use MAKEINDEX or MAKERESOURCEID macros to convert the resource ids to strings.
bCaptureByIndex	Flag of the requested resource. Possible values are:
	Value	Meaning
	TRUE	Indicates that pResID is the index position of the requested resource.
	FALSE	Indicates that pResID is the resource ID of the requested resource.
clrBackGnd	Background color for icons.
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.

Returns

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

Comments

This function is similar to L_CaptureFromEXEDlg, but does not display a dialog box. It simply captures the resource identified by nResType and pResID, from pszFileName. The captured bitmap may or may not have a region, depending on the transparency information of the captured resource.

Use L_CaptureGetResCount to determine the number of resources in an executable.

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_CaptureFromEXEDlg, CAPTURECALLBACK, L_StopCapture, L_CaptureGetResCount
Topics:	Screen Capture C DLL Function Groups: Capture Functions
	Implementing Screen Capture

Example

static 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\\FromEXE.bmp"), pBitmap, FILE_BMP, 0, 0, NULL));
}

L_INT CaptureFromEXEExample(L_VOID)
{
   BITMAPHANDLE Bitmap;

   /*To call the L_CaptureFromExe*/
   L_INT nRet = L_CaptureFromExe(&Bitmap, sizeof(BITMAPHANDLE),
                                 TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Images\\ExeWithResources.exe"),
                                 RESTYPE_ICON,
                                 0,
                                 TRUE,
                                 RGB(255,192,192),
                                 pfnCaptureCallback,
                                 NULL);
   if (Bitmap.Flags.Allocated)
      L_FreeBitmap (&Bitmap);
   return nRet;
}