Hi, wysota
As you may have gathered, I am a beginner in QT Framework and C + +, I'm lost with this new language. Thanks for responding.
First explain to me how do I post to blocks of text like you did.
QT Code:

Second
Regarding your question and I posted, as I open the form (Search Form - frmCadClientes.cpp) in another thread and it works without freezing the main form and other forms open.

Posted the source code to facilitate for those who help me and I understand when the solver put it back in response to the problem.

Thank you for your attention.