@wagmare:

Thank you.

Since I wanted to have access to the index in another file (code2.cpp), i have written this line in code1.cpp:
Qt Code: 
  1. connect(mComboBoxSigSelect, SIGNAL(currentIndexChanged(int)), this, SIGNAL(CurrentIndex(int)));
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and mentioned

signals:
int CurrentIndex(int);

in its header so that I can emit the signal from code1.cpp.
Is it not right?

As you said, if its in the same file, then it would be written as:
Qt Code: 
  1. connect(mComboBoxSigSelect, SIGNAL(currentIndexChanged(int)), this, SLOT(CurrentIndex(int)));
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and in its header file-

private slots:
void currentIndex(int);

Please clarify, thanks