How can you open a file with the program associated with its file extension?

Question

Is there a simple way to open a file by its associated program in windows? (like double clicking it in windows explorer but done automatically with my code)

For exam

Answer 1

According to the MS Knowledge Base, ShellExecute should work (we do this in Delphi all the time):

ShellExecute(Handle, "Open", Filename, "", "C:\", SW_SHOWNORMAL)