Problems whith RegQueryValueEX

See more:

C++

Windows

Hi to everyone,

I have an application that needs to access a file. To know here this file was installed I place a PATH value in the Application Key at the Windows Registry.

Ussualy I use SHGetValue() and it works, however I was using it inside of a class which uses Gtkmm library. And I dont know wy but the ShlwApi.h stoped working inside this class (linking errors to the shlwapi.lib ... unresolved external...bla bla bla). So I instead of finding a solution for the lib I studied how to do without it.

I've created manually a Key at HKEY_LOCAL_MACHINE\SOFTWARE\MYAPP
and created a PATH value REG_SZ type the value at this moment has HEllo WOrld.

At this point I'm doing the following:

HKEY   hkey;
 if  (RegOpenKeyEx (HKEY_LOCAL_MACHINE,TEXT  ("SOFTWARE\\MYAPP"),
	 0,
	 KEY_ALL_ACCESS, 
	 &hkey) == ERROR_SUCCESS)
 {

	 unsigned char rgValue [1024];
	 unsigned char fnlRes [1024];
	 DWORD size1;
	 DWORD type = REG_SZ;
        
         DWORD dwRet;

	 size1=1023;

	 dwRet = RegQueryValueEx( hkey, L"PATH", NULL, &type, (unsigned char*)&rgValue, &size1); // Here I tried with and without reference at rgValue

	 switch (dwRet)
	 {
	 case ERROR_SUCCESS:
		 std::cout << "OK" << std::endl;
		 std::cout << rgValue << std::endl;
		 break;
	 case ERROR_MORE_DATA:
        std::cout << "MORE DATA Error" << std::endl;
		 break;
	 case ERROR_FILE_NOT_FOUND:
		 std::cout << "File Not Found" << std::endl;
		 break;
	 default:
		 
		 std::cout << "OTHER system error code" << std::endl;
		 break;
	 }


 }    


 RegCloseKey(hkey);

-----The Output of this code is:
---- OK -> this means ERROR SUCCESS
---- H -> returns me only the first character of the string in the PATH -> should be Hello WOrld

I'm tring convertions, casts, changing type etc.. but without success.

Can you tell me what I'm doing wrong?

Thanks Apostolo