Thanks, but none of them worked :( Seems like the type needs to be String, otherwise the deskband won't show the 'Show title' option on the context-menu you get when right-clicking the deskband.
Andreas Häber ----- Original Message ----- From: "Dumitru Sbenghe" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, May 20, 2002 3:32 PM Subject: Re: [DOTNET] How to marshal WChar[256] in COM interop? > 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. > > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
