Delphi: a Delphi primary instance, use the Length property to get the length of a music file, as shown in the program, when you select an MP3 file, you can immediately get the length of the file, note that the files in other formats will not work, this property mainly operate multimedia files.

Length属性
..........\Project1.cfg
..........\Project1.dof
..........\Project1.dpr
..........\Project1.res
..........\Unit1.dcu
..........\Unit1.dfm
..........\Unit1.pas
..........\Unit1.~dfm
..........\Unit1.~pas

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