Cannot change modality of a visible form (Error 1573)

[アーティクル]
10/23/2006

The nStyle parameter of the Show method cannot be changed while a form is visible.

You are calling a form's Show method with a parameter while the form is visible.

Change the modality of the form while it is not visible by using code similar to the following:
```
Form1.Hide
Form1.Show(nStyle)
```