GetType for class

[LionAM]

Hello! I want to compare the type of an object to a class. What is the correct syntax to use? In my case, I want to know if a control is an instance of MdiClient. GetType works on the pointer, but not on the class. typeid(MdiClient) gives me error C3767. Alex

[Mark Salsbery]

if (some_ref_handle->GetType() == MdiClient::typeid)
{
//some_ref_handle references a MdiClient object!
}

[LionAM]

Thank you! At first I got an error because MdiClient is a private(?) member of the class (which is not shown in the IntelliSense list). But with Windows::Forms::MdiClient::typeid it works. Alex

[Mark Salsbery]

Cool :)

LionAM wrote:

MdiClient is a private(?) member of the class

MdiClient IS the class.

LionAM wrote:

But with Windows::Forms::MdiClient::typeid it works.

Oops - I guess I assumed "using namespace Windows::Forms;" typeid needs to know the type at compile time. You could also use something like

if (some_ref_handle->GetType() == Type::GetType("Windows::Forms::MdiClient"))

for a runtime check. Cheers, Mark

[LionAM]

Hello! ::MdiClient::typeid works, but MdiClient::typeid gives error C3223: 'System::Windows::Forms::Form::MdiClient' : you cannot apply 'typeid' to a property Alex

[Mark Salsbery]

MdiClient is in the System::Windows::Forms namespace, not the System::Windows::Forms::Form namespace (which doesn't exist - System::Windows::Forms::Form is a class). Either of these should work:

using namespace System::Windows::Forms;
...
if (objectref->GetType() == MdiClient::typeid)

or

if (objectref->GetType() == System::Windows::Forms::MdiClient::typeid)

Mark