LEADTOOLS Raster Imaging Features > Windows > Window Messages > ImageList Control's > L_ILM_HITTEST

L_ILM_HITTEST

Send this message to query the ImageList Control for the index of the item at the specified location.

Parameter	Description
wParam	Ignored, use 0.
lParam	Pointer to a POINT structure containing the location to query.

Returns

>=0	The index of the item at the specified location
< 0	An error occurred, refer to Return Codes.

Comments

This message will return the 0 based index of the item at the specified location, if one exists.

The location is in MM_TEXT mapping mode (pixels), and is relative to the client area of the control's window.

The associated macro is:

L_ImgListHitTest(hWnd, pPoint)

For a complete list of available macros, refer to the Ltlst.h file.

Example

L_INT ILM_HITTESTExample(HWND hCtrl) 
{ 
   if(IsWindow(hCtrl)) 
   { 
      LRESULT lRet; 
      L_TCHAR szText[200]; 
      POINT pt; 
      /* check a location for an item */ 
      pt.x = 80; 
      pt.y = 100; 
      lRet = SendMessage(hCtrl, L_ILM_HITTEST, 0, (LPARAM)&pt); 
      if(lRet >= 0) 
      { 
         wsprintf(szText, TEXT("Item: %ld"), lRet); 
         MessageBox(hCtrl, szText, TEXT("HitTest"), MB_OK); 
      } 
      else 
         MessageBox(hCtrl, TEXT("None"), TEXT("HitTest"), MB_OK); 
      return SUCCESS; 
   } 
   else 
      return ERROR_INVALID_PARAMETER; 
}