Is clear why your struct definition is not good; a LPWStr is a pointer to wchar_t which have 4 bytes in the struct; Your WCHAR wszTitle[256] have 512 bytes in the struct, so you will make a mess in the struct marshaling;
I guess this field definition will work without problems [MarshalAs(UnmanagedType.ByValArray, SizeConst=256)] public byte[] wszTitle; or [MarshalAs(UnmanagedType.ByValArray, SizeConst=256)] public char[] wszTitle; Dumitru Sbenghe http://www.dsbenghe.home.ro/ > Hey, > I'm having problems getting my DeskBand shell extension display it's name > properly. This is happening in the IDeskBand::GetBandInfo method. > > It seems like the error is when marshalling the string. > > The DESKBANDINFO structure which is used to have this information > is defined > in ShObjIdl.idl as: > typedef struct { > DWORD dwMask; > POINTL ptMinSize; > POINTL ptMaxSize; > POINTL ptIntegral; > POINTL ptActual; > WCHAR wszTitle[256]; > DWORD dwModeFlags; > COLORREF crBkgnd; > } DESKBANDINFO; > > This would've been simple if it was LPWSTR lpszTitle; or something like > that, but I can't get that WCHAR correct. > > This is how I've defined the same structure in my code, using C#: > [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Unicode)] > public struct DeskBandInfo > { > public Int32 dwMask; > public POINTL ptMinSize; > public POINTL ptMaxSize; > public POINTL ptIntegral; > public POINTL ptActual; > [MarshalAs(UnmanagedType.LPWStr, SizeConst=256)] public > String wszTitle; > public Int32 dwModeFlags; > public Int32 crBkgnd; > } > > POINTL is a structure I've defined too, but that's not important > right now. > I've also tried using an array of Char as the wszTitle, but the shell > doesn't like that very much :( and won't even call my > IDeskBand::GetBandInfo > method... > > So.. does anybody see what I'm doing wrong here? Right now I only get to > small rectangles as the title of my deskband, which isn't correct. > > Andreas Häber > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or > subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
