[RESOLVED] Regarding member function

Hi,

I was reading a c++ code written in embarcadero ide to add vertical colour text in popup menu.

While reading the code, I had seen following instructions.

private:

Code:

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void __fastcall ExpandMenuItemWidth(TObject *Sender, TCanvas *ACanvas,int &Width, int &Height);

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Code:

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void __fastcall DrawNewItem(TObject *Sender, TCanvas *ACanvas, const TRect &ARect, bool Selected);

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The above two methods used in the code like below:

Code:

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PopupMenu1->Items->Items[i]->OnMeasureItem = ExpandMenuItemWidth;

PopupMenu1->Items->Items[i]->OnDrawItem = DrawNewItem;

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What is happening when we are using member function without parameters like above?
I found above code at: http://edn.embarcadero.com/article/26632
Thanks in advance,

A function name is a pointer. So all you're doing is assigning the pointer to the function to another variable. Later on, that variable will call the function that it was assigned.

Regards,

Paul McKenzie

Quote:

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Originally Posted by Paul McKenzie

A function name is a pointer. So all you're doing is assigning the pointer to the function to another variable. Later on, that variable will call the function that it was assigned.

Regards,

Paul McKenzie

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Thanks for your answer.