为输入控件设置逻辑焦点

To set logical focus to an input control

FocusManager.SetFocusedElement(this, textboxJack);     // set logical focus

要将键盘焦点设置为输入控件

To set keyboard focus to an input control

Keyboard.Focus(textboxJill);                             // set keyboard focus

要了解逻辑焦点和键盘焦点之间的区别

To know the difference between logical and keyboard focus

输入概述-专注于MSDN