16.6 Adding the Undelete Command

File Manager supports a hook for adding an Undelete command to the File menu (below the Delete command). If an undelete dynamic-link library is specified in the WINFILE.INI file, File Manager adds the Undelete command to the File menu when it starts. When the user chooses the Undelete command, File Manager calls the DLL.

The [settings] section of the WINFILE.INI file should include a reference to the undelete DLL, as follows:

[settings]
UNDELETE.DLL=C:\MYDIR\OTHER.DLL

An undelete DLL must include a standard entry point, the UndeleteFile function. This function must be exported by specifying the name of the function in the EXPORTS statement of the DLL's module-definition (.DEF) file.

The UndeleteFile function is defined as follows:

int FAR PASCAL UndeleteFile(hwndParent, lpszDir)
HWND hwndParent;
LPSTR lpszDir;

The hwndParent parameter identifies the parent window for any dialog boxes that the DLL creates. The lpszDir parameter specifies the initial directory to be used (for example, C:\TEMP). For more information about the UndeleteFile function, see the Microsoft Windows Programmer's Reference, Volume 2.