CButton::GetCheck

函数原型：

int GetCheck( ) const;

返回值：

The return value from a button control created with the BS_AUTOCHECKBOX, BS_AUTORADIOBUTTON, BS_AUTO3STATE, BS_CHECKBOX, BS_RADIOBUTTON, or BS_3STATE style is one of the following values:

BST_UNCHECKED　Button state is unchecked.

BST_CHECKED　Button state is checked.

BST_INDETERMINATE　Button state is indeterminate (applies only if the button has the BS_3STATE or BS_AUTO3STATE style).

例子：

CButton myButton;// Create an auto 3-state

button.myButton.Create(_T("My button"), WS_CHILD|WS_VISIBLE|BS_AUTO3STATE, CRect(10,10,100,30), pParentWnd, 1);

// Set the check state to the next state

// (i.e. BST_UNCHECKED changes to BST_CHECKED

// BST_CHECKED changes to BST_INDETERMINATE

// BST_INDETERMINATE changes to BST_UNCHECKED).

myButton.SetCheck( ((myButton.GetCheck()+ 1 ) % 3) );