Non Client Area

[Patrick Blackman]

How do you access the non-client area of a control for painting or resizing
the client area.

Thanks any help would do.

[Matt]

Patrick Blackman wrote:

How do you access the non-client area of a control for painting or resizing
the client area.

Thanks any help would do.
You handle the WM_NCPAINT message in your windows processing handler.From a previous post from a microsoftie:

protected override void WndProc(ref Message msg)
{
// Call the base paint FIRST.
base.WndProc(re f msg);
const int WM_NCPAINT = 0x85;
if (msg.Msg == WM_NCPAINT)
{
// Do your painting here.
}

}

matt

[Patrick Blackman]

Thanks for the info, what I want to do is to access the non client area of a richtextbox so I can paint line numbers at the side, therefore I need to reduce the client rectangle/area, any ideas on this.

I was trying this bit of code but got errors memory:

[DllImport("kern el32", CharSet = CharSet.Auto)]

internal static extern void CopyMemory (WINDOWPOS pDst , IntPtr pSrc , int ByteLen);

[DllImport("kern el32", CharSet = CharSet.Auto)]

internal static extern void CopyMemory(NCCA LCSIZE_PARAMS pDst, IntPtr pSrc, int ByteLen);
[DllImport("kern el32", CharSet = CharSet.Auto)]

internal static extern void CopyMemory(IntP tr pSrc, NCCALCSIZE_PARA MS pDst, int ByteLen);

[StructLayout(La youtKind.Sequen tial)]

internal class NCCALCSIZE_PARA MS

{

[MarshalAs(Unman agedType.ByValA rray, SizeConst = 3)]

public RECT[] rgxRects;

public IntPtr lppos ;

public NCCALCSIZE_PARA MS()

{

}

}

[StructLayout(La youtKind.Sequen tial)]

internal class WINDOWPOS

{

public IntPtr hwnd;

public IntPtr hWndInsertAfter ;

public int x;

public int y;

public int cx;

public int cy;

public int flags;

public WINDOWPOS() { }

}
//WinProc override
protected override void WndProc(ref Message m)

{

case WM_NCCALCSIZE :

NCCALCSIZE_PARA MS aNCCS = new NCCALCSIZE_PARA MS();

Marshal.PtrToSt ructure(m.LPara m, aNCCS);

WINDOWPOS aWinPos = new WINDOWPOS();

// Get the non-client calc size rectangle and window position

CopyMemory( aNCCS, m.LParam, Marshal.SizeOf( aNCCS));

//CopyMemory( aWinPos, aNCCS.lppos, Marshal.SizeOf( aWinPos));

//Populate the non-client rectangle UDT information

aNCCS.rgxRects[0].Left =aWinPos.x;

aNCCS.rgxRects[0].Top = aWinPos.y;

aNCCS.rgxRects[0].Right =75;// aWinPos.x + aWinPos.cx;

aNCCS.rgxRects[0].Bottom = 75;// aWinPos.y + aWinPos.cy;
//Make an adjustment for our line numbers

aNCCS.rgxRects[0].Left = aNCCS.rgxRects[0].Left + 75;

//Duplicate these values in the other rectangle

aNCCS.rgxRects[1] = aNCCS.rgxRects[0];

//copy it back to the lParam pointer address so the process uses the information.

CopyMemory(m.LP aram, aNCCS, Marshal.SizeOf( aNCCS));

base.WndProc(re f m);

}

"Matt" <ma********@spr ynet.com> wrote in message news:11******** **************@ g49g2000cwa.goo glegroups.com.. .

Patrick Blackman wrote:

How do you access the non-client area of a control for painting or resizing
the client area.

Thanks any help would do.

You handle the WM_NCPAINT message in your windows processing handler.

From a previous post from a microsoftie:

protected override void WndProc(ref Message msg)
{
// Call the base paint FIRST.
base.WndProc(re f msg);
const int WM_NCPAINT = 0x85;
if (msg.Msg == WM_NCPAINT)
{
// Do your painting here.
}

}

matt

[Matt]

Patrick Blackman wrote:

Thanks for the info, what I want to do is to access the non client area of a richtextbox so I can paint line numbers at the side, therefore I need to reduce the client rectangle/area, any ideas on this.

NcCalcSize is the message to catch. What error did you get and what
line?

Matt