Delphi change the extension of the file and save, for example, the code in the default file extension ICO, the program will change it to BMP, demonstrates how to intercept and modify the file extension after extension to save the file attributes.

Code\delphi\pudn\upandload\DATA\Delphi_376882\Delphi_376882\rd.txt
....\......\....\.........\....\.............\.............\更改文件的扩展名\WMPTOUR.BMP
....\......\....\.........\....\.............\.............\................\Unit1.dcu
....\......\....\.........\....\.............\.............\................\Unit1.dfm
....\......\....\.........\....\.............\.............\................\Project1.dpr
....\......\....\.........\....\.............\.............\................\WMPTOUR.ICO
....\......\....\.........\....\.............\.............\................\Unit1.pas
....\......\....\.........\....\.............\.............\更改文件的扩展名

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