问题：
[单选题]在窗体上有多个控件，要实现程序运行后焦点默认在某一控件上，应该设置的属性是（ ）。
A、设置Enabled的值为True
B、设置TabIndex的值为1
C、设置TabIndex的值为0
D、设置Index的值为0
参考答案：
C
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