WORD IsDlgButtonChecked(hDlg,nIDButton)
This function determines whether a button control has a checkmark next to it, and whether a three-state button control is grayed, checked, or neither. The IsDlgButtonChecked function sends a BM_GETCHECK message to the button control.
| Parameter | Type/Description |
| hDlg | HWND Identifies the dialog box that contains the button control. | |
| nIDButton | int Specifies the integer identifier of the button control. |
The return value specifies the outcome of the function. It is nonzero if the given control has a checkmark next to it. Otherwise, it is zero. For three-state buttons, the return value is 2 if the button is grayed, 1 if the button has a checkmark next to it, and zero otherwise.