RichTextBox PrintWindow -- let's get real

[WoodBeeProgrammer]

How come everybody on this newsgroup answers easy questions but not hard
questions?

Does PrintWindow work with RichTextBox? If not, WHY NOT? And if not,
what's the workaround?

TIA


[DllImport ("User32.dll ")]
public extern static bool PrintWindow (System.IntPtr hWnd, System.IntPtr dc,
uint reservedFlag);

System.IntPtr hwnd = rtf.Handle;
Bitmap bm = new Bitmap (rtf.Size.Width , rtf.Size.Height );
if (bm != null)
{
using (Graphics g = Graphics.FromIm age (bm))
{
if (g == null) return null;
System.IntPtr bmDC = g.GetHdc ();
bool ok = PrintWindow (hwnd, bmDC, 0); // RETURNS FALSE-- WHY?????
g.ReleaseHdc (bmDC);
}
}
return bm;

[Rami Saad]

Re: RichTextBox PrintWindow -- let's get real

class Test {
delegate bool CallBack(int hWnd, int lParam);
[DllImport("user 32.dll")]
static extern int EnumWindows(Cal lBack hWnd, int lParam);
static bool PrintWindow(int hWnd, int lParam) {
Console.WriteLi ne(hWnd);
return true;
}
static void Main() {
CallBack e = new CallBack(PrintW indow);
EnumWindows(e, 0);
}
}

--
Rami Saad
Microsoft GTSC Developer support for Middle East


"WoodBeeProgram mer" <WoodBeeProgram mer@spamex.com> wrote in message
news:1077353565 .476826@utility .isomedia.com.. .[color=blue]
> How come everybody on this newsgroup answers easy questions but not hard
> questions?
>
> Does PrintWindow work with RichTextBox? If not, WHY NOT? And if not,
> what's the workaround?
>
> TIA
>
>
> [DllImport ("User32.dll ")]
> public extern static bool PrintWindow (System.IntPtr hWnd, System.IntPtr[/color]
dc,[color=blue]
> uint reservedFlag);
>
> System.IntPtr hwnd = rtf.Handle;
> Bitmap bm = new Bitmap (rtf.Size.Width , rtf.Size.Height );
> if (bm != null)
> {
> using (Graphics g = Graphics.FromIm age (bm))
> {
> if (g == null) return null;
> System.IntPtr bmDC = g.GetHdc ();
> bool ok = PrintWindow (hwnd, bmDC, 0); // RETURNS FALSE-- WHY?????
> g.ReleaseHdc (bmDC);
> }
> }
> return bm;
>
>[/color]

[WoodBeeProgrammer]

Re: RichTextBox PrintWindow -- let's get real

Rami, thanks for answering this post, i don't understand what i should do
with the class Test. I'm trying to use the PrintWindow function defined in
User32.dll to render the contents of a RichTextBox offscreen.



"Rami Saad" <rami.saad@egds c.microsoft.com > wrote in message
news:O7WwMpU#DH A.2064@TK2MSFTN GP11.phx.gbl...[color=blue]
> class Test {
> delegate bool CallBack(int hWnd, int lParam);
> [DllImport("user 32.dll")]
> static extern int EnumWindows(Cal lBack hWnd, int lParam);
> static bool PrintWindow(int hWnd, int lParam) {
> Console.WriteLi ne(hWnd);
> return true;
> }
> static void Main() {
> CallBack e = new CallBack(PrintW indow);
> EnumWindows(e, 0);
> }
> }
>
> --
> Rami Saad
> Microsoft GTSC Developer support for Middle East
>
>
> "WoodBeeProgram mer" <WoodBeeProgram mer@spamex.com> wrote in message
> news:1077353565 .476826@utility .isomedia.com.. .[color=green]
> > How come everybody on this newsgroup answers easy questions but not hard
> > questions?
> >
> > Does PrintWindow work with RichTextBox? If not, WHY NOT? And if not,
> > what's the workaround?
> >
> > TIA
> >
> >
> > [DllImport ("User32.dll ")]
> > public extern static bool PrintWindow (System.IntPtr hWnd, System.IntPtr[/color]
> dc,[color=green]
> > uint reservedFlag);
> >
> > System.IntPtr hwnd = rtf.Handle;
> > Bitmap bm = new Bitmap (rtf.Size.Width , rtf.Size.Height );
> > if (bm != null)
> > {
> > using (Graphics g = Graphics.FromIm age (bm))
> > {
> > if (g == null) return null;
> > System.IntPtr bmDC = g.GetHdc ();
> > bool ok = PrintWindow (hwnd, bmDC, 0); // RETURNS FALSE--[/color][/color]
WHY?????[color=blue][color=green]
> > g.ReleaseHdc (bmDC);
> > }
> > }
> > return bm;
> >
> >[/color]
>
>[/color]