🚀 go-pugleaf

"Bsisko" <gary.roberson@bluecasa.net> wrote in message
news:4263f2e9@newsgroups.borland.com...

>      I'm trying to write an application to control the Windows XP desktop!
> Specifically speaking, on how to change the background picture on a daily
> basis.

Change in what way exactly?  If you are working with bitmaps only, then you
can use SystemParametersInfo() with the SPI_SETDESKWALLPAPER  flag.  If you
are working with other image formats, or anything else fancy, then make sure
Active Desktop is enabled and then you can use the IActiveDestop interface.

>     1)  I have a book "Win32 Programming API Bible" that instructs
> me on how to get a thread for the Desktop

Why do you need a thread for the Desktop?

> but I get the compiler error "function is not a member of Application" for
GetCurrentThreadID().

You misspelled the function name.  The name is "GetCurrentThreadId", not
"GetCurrentThreadID".

> HDESK hDesktop = GetThreadDesktop( GetCurrentThreadID() )
> This will get me the desktop handle:

You are thinking of the wrong desktop in that code.

> 2.)  Once I got the desktop handle, how do I find out which thread
> controls the background image, or Active Desktop function as XP calls it.

You don't need to know that to begin with.  You are taking the completely
wrong approach in accessing the Desktop background image.  Please refer to
my comments further above.


Gambit