| Constant | Value | Description |
| flexerrBadBandColIndex | 30020 | The specified band column index is invalid. |
| flexerrBadBandNumber | 30019 | The specified band number is invalid. |
| flexerrBadValue | 380 | The specified property value is invalid. |
| flexerrClipInvalidFormat | 461 | The specified format doesn't match the data format. |
| flexerrDataNotSetForFormat | 676 | The requested data was not supplied to the DataObject during the OLESetData event. |
| flexerrDataObjectLocked | 672 | The DataObject format list may not be cleared or expanded outside of the OLEStartDrag event. |
| flexerrExpectedAnArgument | 673 | At least one argument was expected. |
| flexerrFORMATSTRING | 30018 | Specify the row or column string to be formatted. |
| flexerrGetNotSupported | 394 | The specified property is not available. |
| flexerrHROWsNotReleased | 30023 | Unable to access the data. The DataSource property settings may be incorrect or the DataSource functionality may be limited. |
| flexerrIllegalFunctionCall | 5 | The specified procedure call is invalid. |
| flexerrNotAvailableWithBandedData | 30021 | The specified command is not available when bound to hierarchical data. |
| flexerrObjIllegalUse | 425 | The object use is invalid. |
| flexerrOutOfMemory | 7 | The system is running low on memory. Close any additional applications to free memory for your Visual Basic application. |
| flexerrRecursiveOLEDrag | 674 | Illegal recursive invocation of the OLE drag and drop. |
| flexerrSetNotPermitted | 387 | The specified setting is not permitted. |
| flexerrSubscript | 381 | The specified subscript is out of the allowable range. |
| flexerrUnknownBinding | 30022 | The Hierarchical FlexGrid does not support the requested type of data binding. |
| flexerrUnknownError | 600 | An error has occurred while performing the operation. |
| flexerrUserFormatNotBinArray | 675 | Non-intrinsic OLE drag and drop formats used with the SetData property require Byte array data. The GetData property may return more bytes than were provided to SetData. |
| flexerrVB30000 | 30000 | Cannot perform a RemoveItem on a fixed row. |
| flexerrVB30001 | 30002 | Cannot perform an AddItem on a fixed row. |
| flexerrVB30002 | 30004 | The Hierarchical FlexGrid does not contain the specified row. |
| flexerrVB30004 | 30005 | The column number specified for alignment is invalid. |
| flexerrVB30005 | 30005 | The specified alignment value is invalid. |
| flexerrVB30006 | 30006 | Unable to allocate memory for the Hierarchical FlexGrid. |
| flexerrVB30008 | 30008 | The specified picture type is invalid. |
| flexerrVB30009 | 30009 | The specified row value is invalid. |
| flexerrVB30010 | 30010 | The specified column value is invalid. |
| flexerrVB30011 | 30011 | Unable to register the memory manager. |
| flexerrVB30013 | 30013 | The specified row height value is invalid. |
| flexerrVB30014 | 30014 | The specified column width value is invalid. |
| flexerrVB30015 | 30015 | The last non-fixed row cannot be removed. |
| flexerrVB30016 | 30016 | The specified FixedRows value must be at least one less than the Rows value. |
| flexerrVB30017 | 30017 | The specified FixedCols value must be at least one less than the Cols value. |