On 29/10/2013 17:02, Ross Levis wrote:
I'm wondering if any experts out there can help with this issue.
I'm loading a 3^rd party DLL which needs to have Windows messages sent
to the DLL from my app for navigation purposes. It has been 10 years
since I implemented this code which someone else gave me...
procedure TEngine.ProcessMessage(var Msg: tagMSG; var Handled: Boolean);
begin
if not IsChild(Engine.Handle,Msg.hwnd) then
try
Handled := IsDialogMessage(GetParent(msg.hwnd),Msg);
except
Handled := False;
end;
end;
Application.OnMessage := ProcessMessage;
Without this the DLL GUI would not show which component had the focus,
which was a problem for blind users using the tab key.
The problem: When the DLL is doing something that takes several
seconds, the function above appears to hang waiting for the DLL to
finish, and this causes the main thread in my app to also hang.
Is there any way around that, such as using a separate thread to
process these messages? That would be somewhat out of my league.
Cheers,
Ross.
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Hi,
Have you changed Delphi Versions ? (10 years is a long time :) )
Cheers,
Pieter
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