[!Note]
Valid values depend on which [command](about-commands.md) is specified.
Alink: Specifies the .chm file path and one or more ALink names to look up.
Contents: Specifies the .hhc file path.
Index: Specifies the .hhk file path.
KLink: Specifies the .chm file path and one or more keywords to look up.
Related Topics: Specifies an entry in the Related Topics list.
Shortcut: Specifies the program to open. Depending on the functionality you want to implement with the Shortcut command, you may need to supply additional information.
Splash: Specifies the image file path and length of time the image will appear.
TCard: Specifies the wPARAM and lPARAM values to pass to the Windows WM_TCARD message. Depending on the functionality you want to implement with TCard, you may need to supply additional information.
WinHelp: Specifies the .hlp file path and topic ID (or map number).