来源： http://www.codeproject.com/KB/edit/hexedit.aspx If you have the need to edit character data in HEX and character modes and there is not enough space on the screen to use a fully featured HEX edit control, then this is for you. This HEX edit control allows the user to edit text in HEX or normal ASCII modes and switch between the two. Current text selection cursor position is preserved when switching between the two modes allowing particular areas of text to be highlighted and viewed in HEX mode. Non-printable characters are displayed as an upside-down question mark by default although this character can be changed by calling the SetBinaryCharacter method. The public methods available on CHexEditCtrl are:- displayed as an upside-down question mark by default although this character can be changed by calling the SetBinaryCharacter method. The public methods available on CHexEditCtrl are:-