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Adding "Merge cells" support to the MFC GridControl

, 29 Dec 2002
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Adding "Merge cells" support to the MFC GridControl.

Sample Image - gridcontrl.jpg

Sample Image - print.jpg


This example demonstrates how to add "merge cells" ability to Chris Maunder's MFC Grid control (derived from CWnd).

The example modifies only two classes: CGridCellBase and CGridCtrl. In the class CGridCellBase ,the following four private member variables are added:

CCellRange m_MergeRange;
bool m_IsMergeWithOthers;
CCellID m_MergeCellID;
bool m_Hide;

Six public member functions are also added:

void UnMerge();
virtual bool IsShow() ;
virtual CCellRange GetMergeRange();
virtual bool IsMergeWithOthers();
virtual CCellID GetMergeCellID();
virtual void SetMergeCellID(CCellID cell);

In the class CGridCtrl, the following six public member functions are added:

CGridCellBase* GetCell(CCellID cell);
CCellID GetMergeCellID(CCellID cell);
void UnMergeSelectedCells();
void MergeSelectedCells();
void UnMergeCells(int nStartRow, int nStartCol, int nEndRow, int nEndCol);
void MergeCells(int nStartRow, int nStartCol, int nEndRow, int nEndCol);


  • Use CGridCtrl::MergeSelectedCells() and MergeCells() to merge the selected cells;
  • Use CGridCtrl::UnMergeSelectedCells() and UnMergeCells() to restore the selected cell to its original state.


  • 1.7 fixed the bug when merging in the corner, by Luther Bruck - 2002/12/31
  • 1.6 fixed the bug when resizing the merged row - 2002/11/20
  • 1.5 fixed the bug when resizing the merged column - 2002/11/18
  • 1.4 bug when printing merge cell across pages fixed - 2002/10/10
  • 1.3 fixed cells merge added - 2002/9/27
  • 1.2 print bug fixed - 2002/9/23
  • 1.1 scroll bug fixed - 2002/9/18
  • 1.0 first release - 2002/9/15

(Note that users of the Grid control are bound by Chris' copyright requirements detailed on his web page.)


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Huang Wei
Web Developer
China China
He got Master degree of Theory and Application of Automatic Control from Tsinghua university(Beijing,China) in 1997,from then on he has been working for Tsinghua TongFang Software Co.Ltd,Beijing China.

Comments and Discussions

Generalword wrapping Pinmemberandrew.truckle@atkinsglobal.com7-Oct-04 4:47 
GeneralRe: word wrapping PinmemberIce137421-May-06 6:45 
GeneralRe: word wrapping Pinmemberandrewtruckle21-May-06 9:14 
QuestionCan I have Tree Cells and merged cells on the same grid PinsussRafael Melo13-Sep-04 10:45 
QuestionHow to print MFC GridControl ? Pinmemberlzs14-Aug-04 18:10 
GeneralI can't download the source files. PinsussTommyChoi18-Jun-04 19:59 
General2.25version PinmemberDarter27-Apr-04 2:24 
GeneralRe: 2.25version Pinmemberigrzalja30-Aug-04 5:33 
Well it works for me. I added fix by shawkins (no border lines during selection). If somebody wants the code send me an email. Suspicious | :suss:
GeneralRe: 2.25version Pinmemberandrew.truckle@atkinsglobal.com19-Sep-05 1:46 
GeneralRe: 2.25version Pinmemberqz_yc_kj13-Nov-05 4:37 
GeneralRe: 2.25version Pinmemberhomerhuang21-Feb-06 18:42 
GeneralRe: 2.25version Pinmembermikewolfli25-Apr-06 23:32 
GeneralProblem with Scrolling PinmemberJIJESH.G1-Mar-04 2:16 
GeneralRe: Problem with Scrolling PinsussKiato L.6-Aug-04 2:49 
GeneralProblem with printing merging cells in fixed columns Pinmemberwlegierski2-Dec-03 2:29 
GeneralRe: Problem with printing merging cells in fixed columns Pinmemberyuhonggang27-Nov-04 6:02 
GeneralRe: Problem with printing merging cells in fixed columns PinmemberCui Sheng14-Feb-05 23:15 
GeneralProblem when changing cell colors PinmemberJAlcant12327-Oct-03 13:30 
GeneralFix to problem not showing grid when changing cell colors Pinmembershawkins9-Jan-04 8:48 
GeneralRe: Fix to problem not showing grid when changing cell colors PinsussAnonymous16-Apr-04 11:42 
GeneralRe: Problem when changing cell colors Pinmemberjfougero5-Sep-06 7:04 
GeneralRe: Problem when changing cell colors Pinmembercplky1-Feb-09 0:05 
GeneralHmmmmm Pinmembertankhoasp3-Oct-03 21:14 
GeneralBug when inserting rows before merged-columns row... PinmemberLeaetherStrip20-Aug-03 0:07 
GeneralOK, I fixed it myself :) PinmemberLeaetherStrip20-Aug-03 1:00 

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