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LImageViewer::GetWindowHandle

Summary

Returns a handle to the specified container window.

Syntax

#include "ltwrappr.h"

HWND LImageViewer::GetWindowHandle (uFlags);

Parameters

L_UINT uFlags

Reserved for future use. Pass 0.

Returns

Value	Meaning
> 0	Handle to the container window.
NULL	An error occurred. To get extended error information, call GetLastError, and refer to Return Codes.

Comments

This function gets a handle to the container's window.

Required DLLs and Libraries

LTIVW
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Example

This function returns the bounding rectangle that specifies the absolute position of the cell.

L_INT LImageViewer_GetWindowHandleExample(LImageViewer& ImageViewer, L_INT nCellIndex, RECT * lpRect)  
 
{ 
   L_INT    nRet = 0; 
   RECT     rcRect1, rcRect2 ;  
   POINT    pt ;  
   CWnd     wndContainer, wndCell ;  
 
   // Check whether the cell index is valid or not.  
 
   L_INT nCount = ImageViewer.GetCellCount(0);  
 
   if (nCellIndex < 0 || nCellIndex >= nCount)  
 
   { 
 
      MessageBox(NULL, TEXT("cell index is not valid!"), NULL, MB_OK) ;  
 
      return nRet; 
 
   } 
 
   // Get the cell's bounding rectangle,  
   //the coordinates are relative to the upper left corner of the container window.  
 
   nRet = ImageViewer.GetCellBounds(nCellIndex, &rcRect1, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   pt.x = rcRect1.left;  
   pt.y = rcRect1.top;  
 
   // Get the container window handle.  
 
   nRet = wndContainer.Attach(ImageViewer.GetWindowHandle(0));  
 
   wndContainer.ClientToScreen(&pt);  
 
   // Get the window handle of the cell 
 
   nRet = wndCell.Attach(ImageViewer.GetCellWindowHandle(nCellIndex, 0));  
 
   // Get the client rect for the cell.  
 
   wndCell.GetClientRect(&rcRect2);  
 
   OffsetRect(&rcRect2, pt.x, pt.y);  
 
   CopyRect(lpRect, &rcRect2);  
 
   wndContainer.Detach() ;  
 
   wndCell.Detach() ;  
 
   return SUCCESS; 
}