- wxDataObjectSimpleConstructor accepts the supported format (none by default) which may also be set later with SetFormat(). 
- GetDataHereCopy the data to the buffer, return true on success. 
- GetDataSizeGets the size of our data. 
- GetFormatReturns the (one and only one) format supported by this object. 
- SetDataCopy the data from the buffer, return true on success. 
- SetFormatSets the supported format.