Question

I’m trying to host the CLR inside my C++ application and I’m having problems invoking the entry point of the managed application. The entry point is defined as usual:

static void Main(string[] args) 

And here’s the actual C++ code:

CComPtr<_MethodInfo> entryPoint; hr = assembly->get_EntryPoint(&entryPoint); // this works just fine  if (FAILED(hr))     return hr;  SAFEARRAY *args =      SafeArrayCreateVector(VT_VARIANT, 1, 1); // create an array of the length of 1 ( Main(string[]) )  int     argc; LPWSTR  cmdLine     = GetCommandLineW(); LPWSTR  *argv       = CommandLineToArgvW(cmdLine, &argc); // get an array of arguments to this function  VARIANT vtPsa; vtPsa.vt         = (VT_ARRAY | VT_BSTR); vtPsa.parray     = SafeArrayCreateVector(VT_BSTR, 1, argc); // create an array of strings   for (long i = 0; i < argc; i++) {         SafeArrayPutElement(vtPsa.parray, &i, SysAllocString(argv[i])); // insert the string from argv[i] into the safearray }     long idx[1] = {0}; SafeArrayPutElement(args, idx, &vtPsa); // insert an array of BSTR into the VT_VARIANT args array  VARIANT obj, result; VariantInit(&obj); VariantInit(&result);  try {     hr = entryPoint->Invoke_3(obj, args, &result); // call the entry point } catch(_com_error ex) {     MessageBox(NULL, ex.ErrorMessage(), 'Error', 0); }  if(FAILED(hr)) {     hr = hr; // added just so I can set a breakpoint } 

The errorcode I’m getting is -2146233032, which according to corerror.h corresponds to:

for decimal -2146233032 / hex 0x80131538 :
COR_E_SAFEARRAYRANKMISMATCH
A mismatch has occured between the runtime rank of the array and the rank recorded in the metadata.

Can anyone see the problem?

Answer 1

Shouldn’t the second parameter to SafeArrayCreateVector be 0 in both cases? MSDN lists that value as ‘The lower bound for the array. Can be negative.’