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 */
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