INFO: DCOM95 and DCOM98 Version Information (235638)

MORE INFORMATION

How to Use the Registry to Determine Version

You can check the registry to determine which version of DCOM95 or DCOM98 is installed on a Windows 95-based or Windows 98-based system. If Distributed Component Object Model (DCOM) is installed on the system, the default value of the following registry key: contains the DCOM version that is installed on the system. In the registry, the version number is stored in the format "a,b,c,d", where a, b, c, and d are numeric values that represent the following attributes:

Version Information Table

The following table lists the version information for DCOM95 and DCOM98:

InstalledVersion	DCOM Version or Build Number	Release Type
4,71,0,3328	DCOM95 1.3 and DCOM98 1.3, build 3328.1	Released to the Web
4,71,0,2900	Build 2900.7	Released to Windows 98 Second Edition, Microsoft Internet Explorer 5.0, Microsoft Office 2000
4,71,0,2618	DCOM95 1.2	Released to the Web
4,71,0,2612	DCOM98	Shipped with Microsoft Visual Studio 6.0
4,71,0,1719	Build 1719	Released to Windows 98 Gold, fix for build 1718.
4,71,0,1718	DCOM95 1.1	Released to the Web in October, 1997; released to Internet Explorer 4.01.
4,71,0,1120	Build 1120
4,71,0,426	DCOM95 1.0	Released to the Web in January 1997

How to Programmatically Determine the Version

To programmatically determine if DCOM is installed, use the following code:

    HINSTANCE hDLL = LoadLibrary("OLE32.DLL")
    if(NULL == hDLL)
    {
        // See Winerror.h for explanation of error code.
        DWORD error = GetLastError();
        TRACE1("LoadLibrary() Failed with: %i\n", error);
        return FALSE;
    }
    if (!GetProcAddress(hDLL,"CoCreateInstanceEx"))
    {
        //DCOM is not loaded
    }
    else
    {
        //DCOM is loaded
    }