How can I open a .mmo file?

How Can I run(open) a file that i dont know what extension it may fall from VB 6 application?

• I wan open Any file on click even Irrespect to its file type. Using shell function or openfile function etc. require the application path and file name. But it can,t be pre determine what kind of file it (.mp3, .jpg, .doc, .pdf, .xls etc) and in whhich folder the application(Excel, word or acrobat )installed? What then the solution?

• Answer:

  while opening the file that is not assigned to any program, u usually get a open with dialog box, in that choose the right program to open with and after that select the check box that say, always open with this program in future. u can also set the default opening programs by going to tools->folder options->file types in the file explorer.