Questions about the create message queue for a thread for great god easy language code-CodePudding

as far as I know, after the thread creation is not the message queue. You need to call GetMessage or PeekMessage function about news, but still not receive information after I call

MSDN:

reference

When a message is blocked by UIPI the last error, retrieved with GetLastError, is set to 5 (access denied).

The thread to which The message is posted must have created a message queue, or else The call to PostThreadMessage fails. Use The following method to handle this situation.

Create an event object, then Create the thread.

Use the WaitForSingleObject function to wait for the event to be set to the signaled state before calling PostThreadMessage.

In the thread to which the message will be posted, call PeekMessage to here to force the system to create the message queue.

PeekMessage (& amp; MSG, NULL, WM_USER, PM_NOREMOVE WM_USER)

Set the event, to indicate that the thread is ready to receive the posted messages.

Although know meaning in Chinese but don't understand completely
Below is the thread now do: easy language code

. 
 version 2The support library spec 

The subroutine thread 
Local variable MSG, MSG, MSG type of variable is to receive the information 

PeekMessage (MSG, 0 # WM_USER, # WM_USER, # PM_NOREMOVE) 'first check the message queue "0" this should be to create a queue? 
Judge circulation first (=true) in the operation of the 
PeekMessage (MSG, 0 # WM_USER, # WM_USER, # PM_REMOVE) 'check message queue "returns 0 
"Debug output (MSG) message, MSG. WParam, MSG. The lParam) o 'output is 0 
Sleep (2000) 
. Determine circulation tail ()

Then I API_PostThreadMessage (thread Id, 1, 1, 1) returns 0 first and then call GetLastError () returns 1159
Or delivery failure ah why
PostThreadMessage at the back of the three parameters can be set to?

For online answer such as follows

CodePudding user response:

Use getmessage, don't sleep, don't worry cycle into suspended animation

Dim MSGS as MSG
Do

If getmessage (0, 0, MSGS)=0, then exit the do

The select case MSGS. Message
Case WM_MOUSEMOVE
.
Case...
.
End the select

Loop

Such a process

CodePudding user response:

If you don't want to replace with peekmessage need waitmessage sleep