CComVariant::Detach() fails

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the following code fails:

CString s;
dialogpointer->GetWindowText(s);
CComVariant(s).Detach(NameVariantPointer);

But the following works fine:

CString s;
dialogpointer->GetWindowText(s);
CComVariant var(s);
NameVariantPointer->bstrVal = var.bstrVal;

Posted 11-Apr-10 20:19pm

kartikdasani

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2 solutions

Solution 2

Thanks for the answer.Your solution worked perfectly.

Posted 11-Apr-10 22:31pm

kartikdasani

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Eugen Podsypalnikov · Accepted Answer · 2010-04-11T21:08:00

Solution 1

0) The passed pointer may not be NULL :)
1) The referenced VARIANT must be initialized :) :

{
  VARIANT vTest = {0};
  CComVariant(_T("test")).Detach(&vTest);
...
}

Posted 11-Apr-10 21:08pm

Eugen Podsypalnikov

Updated 11-Apr-10 21:46pm

v2