Fix shortcuts in Delphi
Shortcuts reduce system repetitive files, is a quick starter or open file or folder method, shortcuts are very useful for frequently used programs, files, and folders. In the Windows system, it is full of shortcuts, so how to operate these shortcuts is a very headache problem. In Windows programming, it will undoubtedly encounter problems with the operation shortcut file, such as creating shortcuts for the program. Modify the shortcuts of the program, and so on. In order to make a shortcut, I encapsulate two functions and give a detailed example.
1. Basic information of shortcut file
The information contained in the shortcut is: the target file name, the program runtime, the shortcut, the status, the description, the working directory (starting position), the icon file name, and icon index, etc. When we are operating shortcuts, we should take into account this information.
2. Data structure
For convenience and quick operation, it is necessary to define a data structure so that the necessary information is passed when the function is called:
Const
CCH_MAXNAME = 255; // The size of the buffer described
LNK_RUN_MIN = 7; // Minimize time
LNK_RUN_MAX = 3; // Run is maximized
LNK_RUN_NORMAL = 1; // Normal window
TYPE LINK_FILE_INFO = Record
Filename: Array [0..max_path] of char; // target file name
Workdirectory: Array [0..max_path] of char; // work directory or start directory
IconLocation: array [0..max_path] of char; // icon file name
IconIndex: integer; // icon index
Arguments: array [0..max_path] of char; // The parameters running
Description: array [0..cch_maxname] of char; // shortcut description
Itemidlist: pitemidlist; // only for reading
RelativePath: Array [0..255] of char; // relative catalog, only set
ShowState: integer; // Run window status
Hotkey: Word; // Shortcut
END;
3. Function
1) Net shortcut or modify the information function LINKFILEINFO
It is to be noted that the three units need to add COMOBJ, ACTIVEX, and SHLOBJ in the USES section, but in this example, because of the use of hot keys to be text and using Windows API SHELLEXECUTE, you have to add Menus and SHELLAPI units. At the same time, it is not perfect for exceptional processing. You can modify it according to the actual situation.
Description: The function has three parameters, where the first parameter is a file name of the shortcut to perform, the second is the structure of link_file_info, for receiving information or input information, modifying the shortcut, the third parameter indicates that it is Read shortcuts or set shortcuts. Returns true when the function is successful, otherwise false.
prototype:
Function LinkFileinfo (const lnkfilename: string; var info: link_file_info; const boolean: boolean; var
HR: hRESULT;
PSL: ishelllink;
WFD: Win32_find_data;
PPF: IPERSISTFILE;
LPW: PWIDECHAR;
BUF: PWIDECHAR;
Begin
Result: = FALSE;
GetMem (buf, max_path);
Try
If succeededed (Coinitialize (nil)) THEN
IF (CoCreateInstance (CLSID_SHELLINK, NIL, CLSCTX_INPROC_SERVER, IID_ID_ILLLLINKA, PSL)) Then
Begin
HR: = psl.queryinterface (IPERSISTFILE, PPF);
If succeeded (hr) THEN
Begin
LPW: = StringTowideChar (lnkfilename, buf, max_path);
HR: = PPF.LOAD (LPW, STGM_READ);
If succeeded (hr) THEN
Begin
HR: = psl.resolve (0, SLR_NO_UI);
If succeeded (hr) THEN
Begin
IF bset kil
Begin
Psl.setrGuments; Info.arguments
PSL.SetDescription; Info.description;
PSL.SETHOTKEY (Info.HotKey);
Psl.SeticonLocation (Info.iconLocation, Info.iconIndex);
Psl.setidList (Info.ItemidList);
Psl.SetPath (Info.FileName);
psl.setshowcmd (info.showstate);
Psl.setRelativePath (Info.RaaturePath, 0);
Psl.SetworkDirectory; Info.workdirectory;
Result: = succeeded (PSL.Resolve (0, SLR_UPDATE));
end
Else
Begin
PSL.GetPath (Info.fileName, Max_Path, WFD, SLGP_SHORTPATH);
PSL.GeticonLocation (Info.iconLocation, Max_Path, Info.iconIndex);
PSL.GetWorkingDirectory (Info.workdirectory, Max_Path);
PSL.GetDescription (Info.description, CCH_MaxName);
PSL.Getarguments (Info.arguments, Max_Path);
PSL.GethTKey (Info.HotKey);
PSL.GetidList (Info.ientmidList);
Psl.getshowcmd (info.showstate);
RESULT: = TRUE;
END;
END;
END;
END;
END;
Finally
FreeMem (buf);
END;
END;
2) Establish a shortcut function CreatelinkFile
Description: The first parameter is a link_file_info structure, you must initialize, the second parameter is the file name to save shortcuts, the default to the same name of the LNK file in the same directory.
prototype:
Function CreatelinkFile (const info: link_file_info; const destfilename: string = '): boolean; var
Anobj: iunknown;
SHLINK: ishelllink;
Pfile: IPERSISTFILE;
WFileName: WideString;
Begin
WFileName: = destfilename;
Anobj: = CreateComobject (CLSID_SHELLLINK);
SHLINK: = anobj ashelllink;
Pfile: = anobj as ipersistfile;
Shlink.SetPath (Info.FileName);
SHLINK.SetworkingDirectory (Info.workdirectory);
SHLINK.SETDESCRIPTION (Info.description);
Shlink.setarguments; info.arguments
Shlink.seticonLocation (Info.iconLocation, Info.iconIndex);
Shlink.SetHotKey (Info.HotKey);
SHLINK.SETSHOWCMD (Info.showState);
Shlink.setRelativePath (Info.RaaturePath, 0);
IF destfilename = '' THEN
WFileName: = ChangefileExt (Info.fileName, 'lnk');
Result: = succeeded (pfile.save (pwchar (wfilename), false);
END;
3) Function shortcuttostring is used to convert the hot bond in the shortcut to string to facilitate display, Delphi itself does not provide the associated function.
Function ShortcuttoTString (const hotkey: word): string;
VAR
Shift: TshiftState;
Begin
SHIFT: = [];
IF (WordRec (Hotkey) .hi shr 0) and 1) <> 0 THEN
INCLUDE (Shift, Ssshift);
IF ((Hotkey) .hi shr 1) and 1) <> 0 THEN
Include (Shift, SSCtrl);
IF (WordRec (Hotkey) .hi Shr 2) and 1) <> 0 THEN
Include (Shift, SSALT);
Result: = Shortcuttotext (Shortc (Wordrec (Wordrec (WordRec (Hotkey) .lo, Shift);
END;
4. Call instance:
Create a new Application, put an OpenDialog, three button, one edit on the form, setting OpenDialog's properties Option part of the OfnodeReferenceLinks for True, Filter property is lnk file | * .Lnk; then add button1, button2 and button3 additionally added Code (Note Modify the corresponding file name and path):
Procedure TFORM1.BUTTON1CLICK (Sender: TOBJECT);
VAR
INFO: LINK_FILE_INFO;
Begin
IF openDialog1.execute the
IF linkfileinfo (OpenDialog1.FileName, Info) THEN
begin showmessage ( 'FileName:' info.filename # 13 'Description:' info.Description # 13 'IconFilename:' info.IconLocation ',' inttostr (info.IconIndex) # 13 'WorkDir: ' info.workdirectory # 13 ' arguments: ' info.Arguments # 13 ' Shorcuts: ' ShortcuttoString (Info.Hotkey) # 13 ' WindowsTate: ' INTOSTR (Info.showState) # 13 ' ItemidList: (' ItemIdlist.mkid.cb) ', (' ItemidList.mkid.abid [0]) ')) '); info.workdirectory: = Edit1.Text;
LinkfileInfo (OpenDialog1.FileName, Info, True);
END;
END;
Procedure TFORM1.BUTTON2CLICK (Sender: TOBJECT);
Begin
Shellexecute (Handle, 'Open', 'Start.exe', 'C: /Windows/desktop/aaa.lnk', '', sw_hide);
END;
Procedure TFORM1.BUTTON3CLICK (Sender: TOBJECT);
VAR
INFO: LINK_FILE_INFO;
Begin
Strpcopy (Info.fileName, paramstr (0)); // Shortcut target file name
INFO.Arguments: = '/ paramstr'; // Setting the parameters running
Info.description: = 'Test for link file'; // Description
Info.HotKey: = 0; // No hotkey
Info.iconindex: = 0; // First icon
Info.iiconLocation: = '; // Set the icon file as itself
Info.RaaturePath: = 'windows'; // relative path
Info.showState: = lnk_run_max; // Display Maximization Window
Info.itemidlist: = nil; // Keep unused, can not be set
Strpcopy (info.workdirectory, extractfilepath); // Settings a work directory
CreatelinkFile (Info, 'C: /Windows/desktop/project.lnk'); // Establish shortcut
END;
5. Express operation
There are two ways:
The first is relatively simple, call directly, but subject to some constraints - the START.EXE file must be present in the system:
Shellexecute (Handle, 'Open', 'Start.exe', 'C: /Windows/desktop/aaa.lnk', '', sw_hide); the second is to use SHELLEXECUTE to be called after obtaining the LNK information! For simplicity, no detailed example is given.
The above procedures are passed under Delphi 5.0 Windows 98. If there is any comments and suggestions, welcome to the letter discussion:
E_mail: kingron@163.net
