Managed String To LPCSTR

[Bragadiru]

I want to read from an ini file :
System::String* windowsFolder = System::Environment::SystemDirectory;

System::String* iniFile = System::IO::Path::Combine(windowsFolder,
"My.ini");

char Class[200];

LPCTSTR lstr = 0;

lstr = static_cast<LPCTSTR>(const_cast<void*>(static_cast <const
void*>(Marshal::StringToHGlobalAuto(iniFile))));

// I took this cast from MSDN->Managed Extensions for C++ Migration
Guide->Appendix: Sample Code

// iniFile is good = "C:\winnt\system32\My.ini", BUT lstr is only "C" ?!!!!

GetPrivateProfileString("Section", "Key", "", Class, 199, lstr);

Please help.

Thanks

[Tomas Restrepo \(MVP\)]

Bragadiru,

I want to read from an ini file :
System::String* windowsFolder = System::Environment::SystemDirectory;

System::String* iniFile = System::IO::Path::Combine(windowsFolder,
"My.ini");

char Class[200];

LPCTSTR lstr = 0;

lstr = static_cast<LPCTSTR>(const_cast<void*>(static_cast <const
void*>(Marshal::StringToHGlobalAuto(iniFile))));

// I took this cast from MSDN->Managed Extensions for C++ Migration
Guide->Appendix: Sample Code

// iniFile is good = "C:\winnt\system32\My.ini", BUT lstr is only "C"

?!!!!

That's because in your use of StringToHGlobalAuto(), you're converting to a
wide char string, and storing the result in an ansi one (I bet you're not
compiling with UNICODE/_UNICODE defined).

Instead, use explicitly Marshal::StringToHGlobalAnsi() or STHGUni() as
necessary.
--
Tomas Restrepo
to****@mvps.org

[Bragadiru]

It works. Thank you.

"Tomas Restrepo (MVP)" <to****@mvps.org> wrote in message
news:um****************@TK2MSFTNGP09.phx.gbl...

Bragadiru,

I want to read from an ini file :
System::String* windowsFolder = System::Environment::SystemDirectory;

System::String* iniFile = System::IO::Path::Combine(windowsFolder,
"My.ini");

char Class[200];

LPCTSTR lstr = 0;

lstr = static_cast<LPCTSTR>(const_cast<void*>(static_cast <const
void*>(Marshal::StringToHGlobalAuto(iniFile))));

// I took this cast from MSDN->Managed Extensions for C++ Migration
Guide->Appendix: Sample Code

// iniFile is good = "C:\winnt\system32\My.ini", BUT lstr is only "C" ?!!!!

That's because in your use of StringToHGlobalAuto(), you're converting to

a wide char string, and storing the result in an ansi one (I bet you're not
compiling with UNICODE/_UNICODE defined).

Instead, use explicitly Marshal::StringToHGlobalAnsi() or STHGUni() as
necessary.
--
Tomas Restrepo
to****@mvps.org