DELETEREG (remove a value or key from Windows registry)

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DELETEREG (LONG root, STRING keyname [.STRING valuename])

DELETEREG

Deletes a named entry from the system registry.

root

The root section of the registry from which to delete the value. Valid values for this are defined in equates.clw and are as follows:

 

REG_CLASSES_ROOT

 

REG_CURRENT_USER

 

REG_LOCAL_MACHINE

 

REG_USERS

 

REG_PERFORMANCE_DATA

 

REG_CURRENT_CONFIG

 

REG_DYN_DATA

keyname

The name of the key to delete, or the key to delete from.

valuename

The name of the value to delete. If omitted the whole key is deleted.

 

Vista and Clarion Built-in Registry Functions

On Vista, a (non-elevated) app can READ the registry key HKLM (local machine) with no problems, but as far as writing to the Registry it needs to use HKCU (current user).

If you code sign your executable and run with elevated privileges then you can write to HKLM

 

 

Example:

   PROGRAM

   MAP

   END

 

   INCLUDE('EQUATES')

CurrentPath CSTRING(100)

ColorScheme CSTRING(100)

 

   CODE

  DELETEREG(REG_LOCAL_MACHINE,'SOFTWARE\SoftVelocity\Clarion7','root')

   !remove the root directory entry of the Clarion 6 install

  DELETEREG(REG_CURRENT_USER,'Control Panel\Current')

   !since a specific value is not specified,

   !the entire "Current" key will be removed

 

See Also:

GETREG, PUTREG