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C++ Code

Posted on 2011-02-15
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Last Modified: 2012-08-14
if (MessageDlg(prompt, mtConfirmation, TMsgDlgButtons() << mbYes << mbNo, 0) == mrYes)

What does the code in bold mean? This is Borland C++, though it shouldn't matter. I am trying to figure if TMsgDlgButtons() is accepting parameters?? or is the << operator used as left shit bit operator?? Or anything else. Pls assume very little C++ experience.
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Question by:olmuser
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evilrix earned 125 total points
ID: 34897517
It looks like whatever TMsgDlgButtons() returns (whether it is a function or a constructor for that type) it has overloaded the << operator to allow the setting of values in one operation. In this case it looks like the object is being primed to accept a Yes and No user input (so, it probably displays those buttons).
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by:olmuser
ID: 34897826
This is what the official help document says:

TMsgDlgButtons defines a set of values used by MessageDlg and MessageDlgPos.

Unit

Dialogs

enum TMsgDlgBtn { mbYes, mbNo, mbOK, mbCancel, mbAbort, mbRetry, mbIgnore, mbAll, mbNoToAll, mbYesToAll, mbHelp };
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by:olmuser
ID: 34916756
Can someone help me link the Help page with the actual usage in C++ terms?
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Expert Comment

by:evilrix
ID: 34921228
State what is it you specifically don't understand and I'll try to make it clearer for you.
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