Service Name Filter

In addition to registering service names, DdeNameService enables a server to turn its service name filter on or off. When a server turns off its service name filter, the DDEML sends the XTYP_CONNECT transaction to the server's DDE callback function whenever any client calls the DdeConnect function, regardless of the service name specified in the function. When a server turns on its service name filter, the DDEML sends the XTYP_CONNECT transaction to the server only when DdeConnect specifies a service name the server has specified in a call to DdeNameService.

By default, the service name filter is on when an application calls DdeInitialize. This default prevents the DDEML from sending the XTYP_CONNECT transaction to a server before the server has created the string handles it needs. A server can turn off its service name filter by specifying the DNS_FILTEROFF flag in a call to DdeNameService. The DNS_FILTERON flag turns on the filter.

Software for developers

Delphi Components
.Net Components
Software for Android Developers

More information resources

MegaDetailed.Net
Unix Manual Pages
Delphi Examples

Databases for Amazon shops developers

Amazon Categories Database
Browse Nodes Database