C# Signature:
[DllImport("rpcrt4.dll"]
static extern int UuidCreate(ref UUID id);
VB Signature:
Declare Function UuidCreate Lib "rpcrt4.dll" (ByRef id As UUID) As Integer
User-Defined Types:
[StructLayout(LayoutKind.Sequential)]
private struct UUID
{
public ulong Data1;
public ushort Data2;
public ushort Data3;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst=8)]
public string Data4;
}
private const int RPC_S_OK = 0;
private const int RPC_S_OUT_OF_MEMORY = 14;
private const int RPC_S_UUID_LOCAL_ONLY = 1824;
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
UUID id = new UUID();
rc = UuidCreate(ref id);
if (rc != RPC_S_OK && rc != RPC_S_UUID_LOCAL_ONLY)
{
// Handle error
}
Typically, the UUID is required as a string. Here is how:
[DllImport("rpcrt4.dll")]
private static extern int UuidToString(ref UUID uuid, ref System.IntPtr str);
[DllImport("rpcrt4.dll")]
private static extern int RpcStringFree(ref System.IntPtr str);
public static string generateUUID()
{
int rc;
UUID id = new UUID();
rc = UuidCreate(ref id);
if (rc != RPC_S_OK && rc != RPC_S_UUID_LOCAL_ONLY)
{
throw <cannot create UUID exception>;
}
System.IntPtr str = new System.IntPtr();
rc = UuidToString(ref id, ref str);
switch(rc)
{
case RPC_S_OK:
{
break;
}
case RPC_S_OUT_OF_MEMORY:
{
throw <out of memory excepetion>;
}
default:
{
throw <UuidToString failed exception>;
}
}
string result;
try
{
result = Marshal.PtrToStringAnsi(str);
}
catch(System.Exception ex)
{
throw <PtrToStringAnsi failed exception>;
}
if ((rc = RpcStringFree(ref str)) != RPC_S_OK)
{
throw <RpcStringFree failed exception>;
}
return result;
}
