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Call this function within your control's DoPropExchange member function to serialize or initialize a property of type double.

BOOL PX_Double( 
   CPropExchange* pPX, 
   LPCTSTR pszPropName, 
   double& doubleValue  
BOOL PX_Double( 
   CPropExchange* pPX, 
   LPCTSTR pszPropName, 
   double& doubleValue, 
   double doubleDefault  


Pointer to the CPropExchange object (typically passed as a parameter to DoPropExchange).


The name of the property being exchanged.


Reference to the variable where the property is stored (typically a member variable of your class).


Default value for the property.

Nonzero if the exchange was successful; 0 if unsuccessful.

The property's value is read from or written to the variable referenced by doubleValue, as appropriate. If doubleDefault is specified, it will be used as the property's default value. This value is used if, for any reason, the control's serialization process fails.

Header: afxctl.h