SHELLEXECUTE function is to run an external program (or open a registered file, open a directory, print a file, etc.) and have certain control over external programs.
There are several API functions to implement these features, but in most cases, shellexecute is more used, and it is not too complicated. The following is an example of its usage.
Start a new application
Shellexecute (Handle, 'Open', Pchar ('c: /test/app.exe'), NIL, NIL, SW_SHOW;
Open a notepad and open a file (system can identify the path to the notepad application, so we don't have to use the absolute path)
Shellexecute (Handle, 'Open', Pchar ('Notepad'), Pchar ('C: / Test/readme.txt'), NIL, SW_SHOW;
Print a document
Shellexecute (Handle, 'Print', Pchar ('C: / Test/test.doc'), NIL, NIL, SW_SHOW);
Note: Maybe you will see Word Temporary Open, but it will automatically turn off.
Open an HTML page
Shellexecute (Handle, 'Open', PChar ('
http://www.festra.com/ '), nil, nil, sw_show;
You can open the application through a registered file type
Shellexecute (Handle, 'Open', Pchar ('C: /Test/readme.txt'), NIL, NIL, SW_SHOW;
Open a directory with Windows Explorer
Shellexecute (Handle, 'Explore', Pchar ('C: / Windows)', NIL, NIL, SW_SHOW;
Run a DOS command and return immediately
Shellexecute (Handle, 'Open', Pchar ('Command.com'), Pchar ('/ c copy file1.txt file2.txt'), nil, sw_show;
Run a DOS command and keep the DOS window exist
Shellexecute (Handle, 'Open', Pchar ('Command.com'), Pchar ('/ K Dir'), NIL, SW_SHOW);
