| LEADTOOLS DICOM C DLL Help > Function References > L_DicomExistsVR | 
#include "Ltdic.h"
L_LTDIC_API L_BOOL L_DicomExistsVR(pVR)
| pDICOMVR pVR; | /* pointer to a DICOMVR structure */ | 
Determines whether the pointer to the structure is valid.
| Parameter | Description | 
| pVR | Pointer to a DICOMVR structure. | 
Returns
| TRUE | pVR is a valid pointer. | 
| FALSE | pVR is NULL. | 
Required DLLs and Libraries
| For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application | 
Win32, x64, Linux.
See Also
| Functions: | L_DicomGetFirstVR, L_DicomGetLastVR, L_DicomGetPrevVR, L_DicomGetNextVR, L_DicomFindVR, L_DicomFindIndexVR | 
| Topics: | 
Example
This example checks a VR pointer
L_INT DicomExistsVRExample(L_VOID)
{
   pDICOMVR pVR;
   pVR = L_DicomFindVR(VR_UL);
   if (L_DicomExistsVR(pVR) == FALSE)
      MessageBox(NULL, TEXT("The VR does not exist"), TEXT("Notice"), MB_OK);
   return DICOM_SUCCESS;
}