My Qt project load a DLL library, click on a button, the library sent wm_USER + 100 signal, I in my Qt project how to accept the signal? Winevent can only accept the system signal, can't accept the user-defined signal, I am using Qt4

CodePudding user response:

Premise is you of the library in send custom signal, send handle is qt form,
Then signal can be processed in inside qt:

 
Bool QWidgetB: : winEvent (MSG * message, long * result) 
{
If (message - & gt; Message==(WM_USER + 100)) 
{
QString * text=(QString *) message - & gt; WParam. 
QString STR=* text; 
UI. TextEdit - & gt; Append (STR); 
} 
Return QWidget: : winEvent (message, result); 

Specific can refer to: https://blog.csdn.net/qiangzi4646/article/details/75095894