為CEdit設定背景圖片

 以CSkinEdit( public CEdit )為例:

設定Edit的屬性:Multiline, 無Border

1.映射訊息:
 ON_WM_CTLCOLOR_REFLECT()

HBRUSH CSkinEdit::CtlColor(CDC* pDC, UINT nCtlColor)
{
 // TODO: Change any attributes of the DC here

 CBitmap bmp;
 bmp.LoadBitmap( IDB_BITMAP1 );
 m_Brush.Detach();
 m_Brush.CreatePatternBrush( &bmp );

 pDC->SetBkMode(TRANSPARENT);

 return (HBRUSH)m_Brush;
 
 // TODO: Return a non-NULL brush if the parent's handler should not be called
 return NULL;
}

m_Brush為CBrush類型的成員變數.
特別注意:
pDC的座標原點為Edit控制項左上方在父視窗的座標, 所以IDB_BITMAP1左上方對應Edit父視窗的左上方,而不是Edit控制項的左上方

2.映射訊息:
 ON_CONTROL_REFLECT(EN_CHANGE, OnChange)

void CSkinEdit::OnChange()
{
 // TODO: If this is a RICHEDIT control, the control will not
 // send this notification unless you override the CEdit::OnInitDialog()
 // function and call CRichEditCtrl().SetEventMask()
 // with the ENM_CHANGE flag ORed into the mask.

 // TODO: Add your control notification handler code here
 InvalidateRect( NULL );
 
}