Thanks Mike,

But how do I know which main key to look under - HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER ?

Vidar

>The following will give you a cursor that show all the messaging protocols registered on the client's system. If it is simple MAPI you want to use, loook for the entry under 'MAPI' (It should have a 1 for value). If it is extended MAPI look for MAPIX. If it is CMC look for it under CMC, if it is CDO look for the entry Ole Messaging.
>

#Define ERROR_SUCCESS               0
>#Define KEY_READ               131097
>#Define KEY_ALL_ACCESS         983103
>#Define HKEY_LOCAL_MACHINE     2147483650 && 0x80000002
>Declare Integer RegCloseKey In advapi32 Integer hKey
>Declare Integer RegOpenKeyEx In advapi32;
>           INTEGER   hKey,;
>           STRING    lpSubKey,;
>           INTEGER   ulOptions,;
>           INTEGER   samDesired,;
>           INTEGER @ phkResult
>Declare Integer RegEnumValue In advapi32;
>           INTEGER   hKey,;
>           INTEGER   dwIndex,;
>           STRING  @ lpValueName,;
>           INTEGER @ lpcValueName,;
>           INTEGER   lpReserved,;
>           INTEGER @ lpType,;
>           STRING  @ lpData,;
>           INTEGER @ lpcbData
>hBaseKey = 0
>lcBaseKey = "Software\Microsoft\Windows Messaging Subsystem"
>If RegOpenKeyEx (HKEY_LOCAL_MACHINE, lcBaseKey,;
>                       0, KEY_ALL_ACCESS, @hBaseKey) <> ERROR_SUCCESS
>           ? "Error opening registry key"
>Return
>Endif
>Create Cursor cs (valuename C(50), valuevalue C(200))
>dwIndex = 0
>Do While .T.
>            lnValueLen = 250
>            lcValueName = Repli(Chr(0), lnValueLen)
>                       lnType = 0
>            lnDataLen = 250
>                       lcData = Repli(Chr(0), lnDataLen)
>            lnResult = RegEnumValue (hBaseKey, dwIndex,;
>                       @lcValueName, @lnValueLen, 0,;
>                       @lnType, @lcData, @lnDataLen)
>                       if lnResult <> ERROR_SUCCESS
>                       Exit
>           Endif
>           lcValueName = Left (lcValueName, lnValueLen)
>           lcData = Left (lcData, lnDataLen-1)
>           Insert Into cs Values (lcValueName, lcData)
>           dwIndex = dwIndex + 1
>Enddo
>=RegCloseKey (hBaseKey)
>Select cs
>Index On valuename Tag valuename
>Go Top
>Browse Normal Nowait

>
>Note that portions of this code comes from www.news2news.com
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>>>You have to find out if the other mail programs can and have established themselves as the Simple MAPI client or not. Outlook and OutlookExpress both have that as a configuration item under Tools/Options.
>>
>>Can't seem to find this option under Tools/Options in Outlook 2000. Do you know where it can be found there?
>>
>>Will setting this option (in Outlook or OutlookExpress) create the MAPI Profiles key (Software\Microsoft\Windows Messaging Subsystem\Profiles) in the registry if it doesn't already exist?
>>
>>Also, will the the MAPI Profiles key differ under different versions of Windows? (Please specify which key under which version.)