Change Size?

Public Type Margins 

cyTopHeight As Long 

cxLeftWidth As Long 

cyBottomHeight As Long 

cxRightWidth As Long 

End Type

Private dwmMargins As  MARGINS

' Adjust (shrink) the client rectangle to accommodate' 

the border'

'about rgrc --> 0 new 1 old 2 window 'client rectangle '

'before moved or resized '

       

nccsp.rgrc0.Top=0

nccsp.rgrc0.Bottom= 0

nccsp.rgrc0.Left=0

nccsp.rgrc0.Right=0

       

dwmMargins.cyTopHeight=nccsp.rgrc0.Top-nccsp.rgrc0.Top

dwmMargins.cxLeftWidth=nccsp.rgrc0.Left-nccsp.rgrc0.Left

dwmMargins.cyBottomHeight=nccsp.rgrc0.Bottom-nccsp.rgrc0.Bottom

dwmMargins.cxRightWidth=nccsp.rgrc0.Right-nccsp.rgrc0.Right

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WVR_VALIDRECTS0x0400


This value indicates that, upon return from WM_NCCALCSIZE, the rectangles specified by the rgrc[1] and rgrc[2] members of the NCCALCSIZE_PARAMSstructure contain valid destination and source area rectangles

    

(cxfr=GetSystemMetrics(SM_CXSIZEFRAME

(cyfr= GetSystemMetrics(SM_CYSIZEFRAME
InflateRect lpncsp.rgrc,cxfr-1,cyfr-1

The InflateRect function increases or decreases the 

.width and height of the specified rectangle