On Fri, 19 Sep 2014 17:20:27 +0800 Xiangrong Fang <xrf...@gmail.com> wrote:
>[...] > My question is, why cannot Lazarus just use PostMessage, but invent the > QueueAsyncCall() method? What is the rationale, or, why PostMessage is > considered windows-ish (read: not fit into LCL very well?), apart from the > fact that it is a Windows API? Please ask Lazarus question on the Lazarus lists. PostMessage is a WinAPI function that sends an uint, and two pointer sized integers to a Windows Handle with a queue, even to another process. See here: http://msdn.microsoft.com/en-us/library/windows/desktop/ms644944%28v=vs.85%29.aspx The LCL emulates some parts of PostMessage on other widget sets. TApplication.QueueAsyncCall on the other side allows to call a method in the main thread with an optional data pointer. And the call can be removed from the queue. Mattias _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
