How to use the Qt3 Support members in Qt4?

[Cutey]

Hi Folks,

In my project(Qt4) I'm using

void QGridLayout::addColSpacing ( int col, int minsize )

void QGridLayout::addColSpacing ( int col, int minsize )

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the above method but I'm getting the following error " 'addColSpacing' : is not a member of 'QGridLayout'. "

Can any one help me in this regard..!!!