Adding browse function to macro

Hello

I'm creating a macro that will insert a isometric view into a blank drawing and save as DXF.  Currently, it saves the DXF on the C drive.

The group that is going to use this macro wants to browse to a location and I don't have a clue how to do that.  I've tried some of the code posted in other discussions but it doesn't work.  Below is my form that I'm using.

Does anyone have some code I can use for the browse button? Or better yet I click the save button and it opens up a browse window and I can enter the file name.

Thanks...Rob

SolidworksApi macros