Show:
Use Show to set the form Visible property to True and to bring the form to the front of other forms on the screen.
ShowModal:
Use the showmodal to show a form as a modal form. A modal form is one where the application can continue to run until the form is closed. Thus, ShowModal does not return until the form closes. When the form is closes, it returns the value of the Modalresult property.
the translation into Chinese probably means:
Show just lets a window show, for example in Form1 form2->show (), then you can continue to click on Form1 after Form2 display.
The ShowModal is to display the window as a modal window, which means that the program can only continue to execute the following statement after the window is closed, such as Form1 form2->showmodal (), so Form1 is not available until Form2 is closed.
The difference between ShowModal and Show
