Implementing Scrollbars: Step 2

Modify the Color.H file to add global variables and the prototype for a function that aids in calculating scroll ranges and positions.

The function prototype should appear as follows: 

/* Use this function to interpret the WM_SIZE message's client area parameters */ 
void CalcClientMetrics (HWND hWnd,  
                        int *nClientWidth,  
                        int *nClientHeight,  
                        int *nRightBarThickness, 
                        int *nBottomBarThickness);

The global variables should appear as follows: 

int XScrollRange, YScrollRange; /* Scrollbar ranges */ 
int XScrollPosition, YScrollPosition; /* Scrollbar positions */

Help Version 21.0.2023.2.15
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LEADTOOLS Raster Imaging C API Help
Introduction
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Getting Started
Files To Be Included With Your Application
Document Writers – Files To Be Included With Your Application
LEADTOOLS Raster Imaging Features
Quick Reference
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Callback Functions
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Appendix
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.