Hi,
I am creating a excel graph in c++ using COM. While fetching Ids using GetIDsofName method it is giving me the the E_ACCESSDENIED can you please help me to fix this issue. Following is the code
main()
CoInitialize(NULL);
CLSID clsid;
HRESULT hr = CLSIDFromProgID(L"Excel.Application", &clsid);
if(FAILED(hr)) {
::MessageBox(NULL, "CLSIDFromProgID() failed", "Error", 0x10010);
return -1;
}
IDispatch *pXlApp;
hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void **)&pXlApp);
if(FAILED(hr)) {
::MessageBox(NULL, "Excel not registered properly", "Error", 0x10010);
return -2;
}
{
VARIANT x;
x.vt = VT_I4;
x.lVal = 1;
AutoWrap(DISPATCH_PROPERTYPUT, NULL, pXlApp, L"Visible", 1, x);
}
AutoWrap()
HRESULT AutoWrap(int autoType, VARIANT *pvResult, IDispatch *pDisp, LPOLESTR ptName, int cArgs...) {
va_list marker;
va_start(marker, cArgs);
if(!pDisp) {
MessageBox(NULL, "NULL IDispatch passed to AutoWrap()", "Error", 0x10010);
_exit(0);
}
DISPPARAMS dp = { NULL, NULL, 0, 0 };
DISPID dispidNamed = DISPID_PROPERTYPUT;
DISPID dispID;
HRESULT hr;
char buf[200];
char szName[200];
WideCharToMultiByte(CP_ACP, 0, ptName, -1, szName, 256, NULL, NULL);
hr = pDisp->GetIDsOfNames(IID_NULL, &ptName, 1, LOCALE_USER_DEFAULT, &dispID);
if(FAILED(hr)) {
sprintf(buf, "IDispatch::GetIDsOfNames(\"%s\") failed w/err 0x%08lx", szName, hr);
MessageBox(NULL, buf, "AutoWrap()", 0x10010);
_exit(0);
return hr;
}
VARIANT *pArgs = new VARIANT[cArgs+1];
for(int i=0; i<cArgs; i++) {
pArgs[i] = va_arg(marker, VARIANT);
}
dp.cArgs = cArgs;
dp.rgvarg = pArgs;
if(autoType & DISPATCH_PROPERTYPUT) {
dp.cNamedArgs = 1;
dp.rgdispidNamedArgs = &dispidNamed;
}
hr = pDisp->Invoke(dispID, IID_NULL, LOCALE_SYSTEM_DEFAULT, autoType, &dp, pvResult, NULL, NULL);
if(FAILED(hr)) {
sprintf(buf, "IDispatch::Invoke(\"%s\"=%08lx) failed w/err 0x%08lx", szName, dispID, hr);
MessageBox(NULL, buf, "AutoWrap()", 0x10010);
_exit(0);
return hr;
}
va_end(marker);
delete [] pArgs;
return hr;
}
Thank You