When the PPC is used in landscape mode, some problems could appear when using
the MessageBox Win32 API.
The MPEGTV guys have written a DLL which solve these problems. In the last
version (1.7), a .Net wrapper has been added. It is fully CLS compliant (so
can be used with C# or VB.Net) and has exactly the same interface as the
MessageBox .Net class. Normally (I've recently had a lot of troubles with
that point), this wrapper is designed to be added into the PPC GAC.
The MsgBox library can be found here :
http://www.mpegtv.com/wince/msgbox/