<div>
don't forget Windows Atoms, too.<br />

</div>


<div>
then we could also go into Memory Mapped files and SendMessage with WM_COPYDATA :)<br />
lots of ways to communicate in windows .. gotta love 'em :)
</div>


then we could also go into Memory Mapped files and SendMessage with WM_COPYDATA :)
lots of ways to communicate in windows .. gotta love 'em :)

<div>
You can probably accomplish this through some CORBA or COM handshaking as well. &nbsp;<br />
<br />
Directory monitoring API. (indirect Sendmessage)<br />
DDE (an oldie)<br />
inter-process Winsock<br />
<br />
Dang, this list could get long.<br />
<br />
I don't want to confuse dabestprogrammerindauniver<wbr />se, so let me recommend that Lee_Nover get the points for the correct answer.<br />

</div>


You can probably accomplish this through some CORBA or COM handshaking as well.  

Directory monitoring API. (indirect Sendmessage)
DDE (an oldie)
inter-process Winsock

Dang, this list could get long.

I don't want to confuse dabestprogrammerindauniverse, so let me recommend that Lee_Nover get the points for the correct answer.


<div>
I have a component at Torry's that does what you need <br />
look for IPC. It's freeware but beware that this will not work in a NT service app.<br />
<br />
<a href="http://www.torry.net/vcl/system/appscommunications/bmipc.zip" rel="ugc">http://www.torry.net/vcl/system/appscommunications/bmipc.zip</a><br />
<br />
Good Luck Bill :-)
</div>


I have a component at Torry's that does what you need
look for IPC. It's freeware but beware that this will not work in a NT service app.

http://www.torry.net/vcl/system/appscommunications/bmipc.zip [http://www.torry.net/vcl/system/appscommunications/bmipc.zip]

Good Luck Bill :-)

<div>
<div class="content wysiwyg-content">
hi! i have 2 programs. &nbsp;program A and program B. &nbsp;i want program A to communicate with program B through windows messaging wherein program B will then do something on program A's command. &nbsp;thanks in advance to everyone! :)
</div>
</div>


hi! i have 2 programs.  program A and program B.  i want program A to communicate with program B through windows messaging wherein program B will then do something on program A's command.  thanks in advance to everyone! :)

Windows programming

Delphi is the most powerful Object Pascal IDE and component library for cross-platform Native App Development with flexible Cloud services and broad IoT connectivity. It provides powerful VCL controls for Windows 10 and enables FMX development for Windows, Mac and Mobile. Delphi is your choice for ultrafast Enterprise Strong Development™. Look for increased memory for large projects, extended multi-monitor support, improved Object Inspector and much more. Delphi is 5x faster for development and deployment across multiple desktop, mobile, cloud and database platforms including 32-bit and 64-bit Windows 10.