I have a non-visual component that uses AllocateHwnd and
DeAllocateHwnd. My component compiles, but
gives me a 'RunError(217)' when I try to use it in a test program .
The error is occurs at the AllocateHwnd instruction in my component's
constructor, where the exact usage is:
if not (csDesigning in ComponentState) then FNotifyWnd :=
AllocateHWnd(@TimerWndProc);
TimerWndProc is declared in the protected section of my component code.
Can anyone tell me if AllocateHwnd is implemented in my version of
Lazarus, and where I may be going wrong in
my usage? I'm stumped. I see that it was discussed quite a bit in
2007, but not sure of the current status.
Any input appreciated.
PS: if I try
if not (csDesigning in ComponentState) then FNotifyWnd :=
AllocateHWnd(TimerWndProc);
the component won't compile. But I've seen this usage at various
places too.
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