Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

How to: Convert Between System::Guid and _GUID

The following code sample shows how to convert between a Guid and a _GUID.

// convert_guids.cpp
// compile with: /clr
#include <windows.h>
#include <stdio.h>

using namespace System;

Guid FromGUID( _GUID& guid ) {
   return Guid( guid.Data1, guid.Data2, guid.Data3, 
                guid.Data4[ 0 ], guid.Data4[ 1 ], 
                guid.Data4[ 2 ], guid.Data4[ 3 ], 
                guid.Data4[ 4 ], guid.Data4[ 5 ], 
                guid.Data4[ 6 ], guid.Data4[ 7 ] );
}

_GUID ToGUID( Guid& guid ) {
   array<Byte>^ guidData = guid.ToByteArray();
   pin_ptr<Byte> data = &(guidData[ 0 ]);

   return *(_GUID *)data;
}

int main() {
   _GUID ng = {0x11111111,0x2222,0x3333,0x44,0x55,0x55,0x55,0x55,0x55,0x55,0x55};
   Guid mg;
 
   Console::WriteLine( (mg = FromGUID( ng )).ToString() );
   _GUID ng2 = ToGUID( mg );

   printf_s(  "%x-%x-%x-", ng2.Data1, ng2.Data2, ng2.Data3 );
   for (int i = 0 ; i < 8 ; i++) {
      if (i == 2)
         printf_s("-");
      printf_s("%x", ng2.Data4[i]);
   }
   printf_s("\n");
}
11111111-2222-3333-4455-555555555555 11111111-2222-3333-4455-555555555555

Community Additions

ADD
Show:
© 2015 Microsoft