Add a custom help search for a field

When you press F4 on any field in screen, search help is displayed for the user which helps him select a value.

Many standard fields are already incorporated with search helps.

In case you want to add custom search help to any field in screen ,
useMATCHCODE OBJECT<searchhelpname>

Ex:PARAMETERS: PARA1 TYPE VBRK-VBELN MATCHCODE OBJECT ZAU_MAT.