Text background color of the edit box

Wm_ctlcolor The function corresponding to the message is Onctlcolor , Onctlcolor The function is prototype: Afx_msg hbrush Onctlcolor (CDC *PDC,Cwnd* Pwnd,UintNctlcolor ); Parameters PDC Yes: a pointer to the device environment. Pwnd : Specifies a specific control. Nctlcolor: Specifies the control type. The following types are available:

Ctlcolor_btnButton ControlCtlcolor_dlgDialog BoxCtlcolor_editEdit Control

Ctlcolor_listboxList boxCtlcolor_msgboxMessage Box

Ctlcolor_scrollbarScroll barCtlcolor_staticStatic text, frame, or rectangle

To highlight the display Number of the text box, we set the text background to yellow.

Procedure 1 Add a member variable Hbrush m_hbrush;

Procedure 2 , Use Class Wizard Is Cguessdlg Join Wm_ctlcolor Message, and edit Onctlcolor Function:

HbrushCguessdlg: onctlcolor (CDC * PDC, cwnd * pwnd, uint nctlcolor)

{

If (nctlcolor = ctlcolor_edit)

{PDC-> setbkcolor (RGB (255,255, 0); // EditControl text background is yellow

Return m_hbrush;

}

Return cdialog: onctlcolor (PDC, pwnd, nctlcolor );

}

Compile and run. All text in the text box is yellow