How to collapse other expanded item

Hi,
I have 5 department on a tree view datawindow and each department consists of employee name. When I try to expand department 5 how to make
other departments as collapsed if they have been already isexpanded before. The users want to view the current item to be expanded state.
Please help
Pol

Please can you provide a sample code for that.
//long l_grouplevel_old,li_row_old // //l_grouplevel_old = l_grouplevel //li_row_old = li_row //l_grouplevel = grouplevel //li_row = row // // dw_1.Collapse(l_grouplevel_old,li_row_old) But it is not working

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Ghostenigma,
switch Option Strict On. I've tried to analyze the code but it's not usable due to type ignorance.
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How to collapse other expanded item

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