Zooming In on a Selection: Step 7

In the MainWndProc function, add code to process WM_RBUTTONDOWN messages. This code displays the full image when the user clicks the right mouse button. During testing, this lets you try the selection feature more than once. The code should appear as follows: 

case WM_RBUTTONDOWN:   
   /* Set the source rectangle for painting */   
   SetRect(&rLeadSource, 0, 0, LeadBitmap.Width, LeadBitmap.Height);   
   /* Make the destination rectangle for painting the same as the client area */   
   rLeadDest = rClientSize;   
   /* Update the global variables for keeping track of the display */   
   DisplayLeft = 0;   
   DisplayTop = 0;   
   DisplayWidth = rClientSize.right;   
   DisplayHeight = rClientSize.bottom;   
   /* Repaint the whole client area */   
   InvalidateRect(hWnd,NULL,FALSE);   
   return (0);

Help Version 21.0.2023.2.15
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Raster Imaging C API Help
Introduction
Version History
Getting Started
Files To Be Included With Your Application
Document Writers – Files To Be Included With Your Application
LEADTOOLS Raster Imaging Features
Quick Reference
Tutorials
Function References
Callback Functions
Summary of Features
Appendix
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.