A Validating Edit Control

#if !defined(AFX_FLOATINGEDIT_H__7DC36E2E_AE1D_11D4_A002_006067718D04__INCLUDED_)
#define AFX_FLOATINGEDIT_H__7DC36E2E_AE1D_11D4_A002_006067718D04__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// FloatingEdit.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CFloatingEdit window

class CFloatingEdit : public CEdit
{
// Construction
public:
	CFloatingEdit();

// Attributes
public:
   BOOL IsValid() {return SyntaxValid && ValueValid; };
   BOOL IsSyntaxValid() { return SyntaxValid; }
   BOOL IsValueValid()  { return ValueValid; }
   /****************************************************************************
   *                               UWM_CHECK_VALUE
   * Inputs:
   *       WPARAM: MAKELONG(GetDlgCtrlID(), EN_CHANGE)
   *	LPARAM: (LPARAM)(HWND): Window handle
   * Result: BOOL
   *       TRUE if value is acceptable
   *	FALSE if value has an error
   * Effect: 
   *       If the value is FALSE, the window is marked as an invalid value
   *	If the value is TRUE, the window is marked as a valid value
   * Notes:
   *	This message is sent to the parent of the control as a consequence
   *	of the EN_CHANGE notification, but only if the value is syntactically
   *	correct. It may be sent at other times as well
   ****************************************************************************/
   static UINT UWM_CHECK_VALUE;

   /****************************************************************************
   *                              UWM_VALID_CHANGE
   * Inputs:
   *       WPARAM: (WPARAM)MAKELONG(GetDlgCtrlID(), BOOL) Flag indicating new valid state
   *       LPARAM: Window handle of child window
   * Result: LRESULT
   *       Logically void, 0, always
   * Effect: 
   *       Notifies the parent that the validity of the input value has changed
   ****************************************************************************/
   static UINT UWM_VALID_CHANGE;
// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CFloatingEdit)
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CFloatingEdit();

	// Generated message map functions
protected:
        CBrush errorBrush;
	CBrush partialBrush;
	CBrush emptyBrush;
	CBrush OKBrush; 
	CBrush * Check();
	BOOL SyntaxValid;
	BOOL ValueValid;
	//{{AFX_MSG(CFloatingEdit)
	afx_msg void OnChar(UINT nChar, UINT nRepCnt, UINT nFlags);
	//}}AFX_MSG
        afx_msg HBRUSH CtlColor(CDC * dc, UINT id);
	afx_msg BOOL OnChange();
	DECLARE_MESSAGE_MAP()
};



/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_FLOATINGEDIT_H__7DC36E2E_AE1D_11D4_A002_006067718D04__INCLUDED_)