return msg.wParam ;
}
LRESULT CALLBACK WndProc ( HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
switch (message)
{
case WM_DESTROY :
DeleteObject ((HGDIOBJ) SetClassLong (hwnd, GCL_HBRBACKGROUND,
(LONG) GetStockObject (WHITE_BRUSH))) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
BOOL CALLBACK ColorScrDlg ( HWND hDlg, UINT message,WPARAM wParam, LPARAM lParam)
{
static int iColor[3] ;
HWND hwndParent, hCtrl ;
int iCtrlID, iIndex ;
switch (message)
{
case WM_INITDIALOG :
for (iCtrlID = 10 ; iCtrlID < 13 ; iCtrlID++)
{
hCtrl = GetDlgItem (hDlg, iCtrlID) ;
SetScrollRange (hCtrl, SB_CTL, 0, 255, FALSE) ;
SetScrollPos (hCtrl, SB_CTL, 0, FALSE) ;
}
return TRUE ;
case WM_VSCROLL :
hCtrl = (HWND) lParam ;
iCtrlID = GetWindowLong (hCtrl, GWL_ID) ;
iIndex = iCtrlID - 10 ;
hwndParent = GetParent (hDlg) ;
switch (LOWORD (wParam))
{
case SB_PAGEDOWN :
iColor[iIndex] += 15 ; // fall through
case SB_LINEDOWN :
iColor[iIndex] = min (255, iColor[iIndex] + 1) ;
break ;
case SB_PAGEUP :
iColor[iIndex] -= 15 ; / |