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Data Types

The following data types are used by Microsoft® Certificate Server interface methods.

Microsoft
Visual Basic®

Java

C++
int short ---
long int LONG
BSTR java.lang.String BSTR
DATE double DATE
VARIANT com.ms.Variant VARIANT

VARIANT type variables have a type tag field vt that indicates the data type of the data. VARIANT type return values are returned by methods with the type tag field set to the data type of the return value. VARIANT type input parameters in a method call must have the type tag field set by the application to one of the supported values. The correspondence of parameter types to data types is as follows.

Parameter Type Data Type
PROPTYPE_LONG VT_I2 or VT_I4
PROPTYPE_DATE VT_DATE
PROPTYPE_BINARY VT_BSTR or (VT_BSTR | VT_BYREF)
PROPTYPE_STRING VT_BSTR or (VT_BSTR | VT_BYREF)

The following example written in C++ shows how the type tag field could be initialized for a call to the ICertServerPolicy::SetCertificateExtension method:

HRESULT hr;
BSTR strExtensionName = SysAllocString("2.29.38.4");
VARIANT varExt;
varExt.vt = VT_BSTR;    // initialize type tag field
varExt.bstrVal = SysAllocString("http://UrlTest.htm");

hr = pICertServerPolicy->SetCertificateExtension(
    strExtensionName,      // extension name
    PROPTYPE_STRING,
    EXTENSION_CRITICAL_FLAG,
    &varExt);

// Use the strAttributeValue ...

// free it when done
if (NULL != strExtensionName)
{
    SysFreeString(strExtensionName);
}
VariantClear(&varExt);
 

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