[SOLVED] BroadcastSystemMessage LPDWORD parameter incompatibility
lazarus / 34-Windows

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Kepsz · 2015-07-24 09:05

After modify the PATH env variable in regedit, it is required to send
a WM_SETTINGSCHANGE system message to finish the PATH update.

This is how i try to do this:
Code: [Select]BroadcastSystemMessage(BSF_POSTMESSAGE,
BSM_ALLCOMPONENTS, WM_SETTINGCHANGE, 0, 0);
But there are problem with the 3. paramterer. "Got ShortInt", expected
"LPDWORD".
The value of WM_SETTINGCHANGE is 26. I tryed replaceing it with
different numeric types, but just get various type incompatible
messages.

So i do not know how to solve this. Lazarus 1.4.2 32bit.

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rvk · 2015-07-24 10:39

Are you sure the problem is with parameter 3???
Please copy and paste the error messaged here.
(you can right click and choose copy/selected message)

I think the problem is with parameter 2.
Try this:
Code: [Select]var
  dwRecipient: DWord;
begin
  dwRecipient := BSM_ALLCOMPONENTS;
  BroadcastSystemMessage(BSF_POSTMESSAGE, @dwRecipient,
WM_SETTINGCHANGE, 0, 0);

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Kepsz · 2015-07-24 11:15

Hmm, seems like i get lost in the parameter list. o.O That was the
second parameter, not the third.

Thanks for your code sample, now it's working fine!