Hello to all. I have a project which is scheduling system using vb6. I can't or don't know how to find the time conflicts of each subject at the given day and given professor. For example user select the section name then a combo box for selection of subject then the a 5 checkbox(array) will unlocked then the user will select from monday - friday checkbox(array) then the combo box for the selection of start time will unlocked then another combo box for the selection of end time will unlocked and the last one is the combo box for the selection of the professor. I hope you can help me. thank you in advance.