Desktop Handle

[Juan Romero]

Hi guys,

Does anyone know how I can get a handle to the desktop or the screen? (of
for this matter, the device context handle)

I want a program to write some stuff there, but I can't seem to get a
handle. I tried calling API functions, but they return me a negative handle
(-99999), so although the calls I make subsequently do not raise any errors,
nothing gets written to the screen.

Please help.

[Herfried K. Wagner [MVP]]

* "Juan Romero" <ju*********@bowne.com> scripsit:

Does anyone know how I can get a handle to the desktop or the screen? (of
for this matter, the device context handle)

I want a program to write some stuff there, but I can't seem to get a
handle. I tried calling API functions, but they return me a negative handle
(-99999), so although the calls I make subsequently do not raise any errors,
nothing gets written to the screen.

Did you try it with these declares?

\\\
Private Declare Auto Function GetDesktopWindow Lib "user32.dll" ( _
) As IntPtr
Private Declare Auto Function GetDC Lib "user32.dll" ( _
ByVal hwnd As IntPtr _
) As IntPtr
Private Declare Auto Function ReleaseDC Lib "user32.dll" ( _
ByVal hwnd As IntPtr, _
ByVal hdc As IntPtr _
) As Int32
///

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>