VB.net Dialog Box

Question

We've ceated a VB.net dialog box for data input.  I have a parameter field that needs to be format for customer's input.  Ex: Parameter Description field (FROM DATE) and the input Parameter ID (CELLTYPE=DATE).  However, I need to force the format to be "MM/DD/YYYY".  Can I format on the Parameter ID field like this: CELLYYPE=DATE, "MM/DD/YYYY" ???
Please help!!