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Posted 14 May 2004

A "Don't show this again" checkbox for the .NET MessageBox

, 14 May 2004
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A C# class which uses Dino Esposito's LocalCbtHook component to add a "Don't show this again" checkbox to any .NET MessageBox.

Sample Image - MessageBoxChk.gif


Every developer is familiar with the Windows MessageBox, but sometimes we need just a little bit more. For instance, what if I want a "Don't show this warning again" checkbox at the bottom of my MessageBoxes, enabling the user to turn off certain alerts, but I don't want to write my own dialog from scratch, covering every possible button combination? The MsgBoxCheck class does just that.


This article, and the MsgBoxCheck class, is built on two columns by Dino Esposito which appeared in MSDN Magazine's "Cutting Edge" in October and November of 2002. These describe the use of Windows Hooks in C#, in particular how to hook the creation and activation of the Windows MessageBox.

Using the code

Using the MsgBoxCheck class is as simple as using the Windows MessageBox. First, add a reference to MsgBoxCheck.dll in your C# project. Most people will invoke the class as follows:

MsgBoxCheck.MessageBox dlg = new MsgBoxCheck.MessageBox();
DialogResult dr =
        "Don't ask me this again",
        "Now is the time for all good men to check this message box",
        MessageBoxButtons.OK, MessageBoxIcon.Information);

The first two parameters describe the registry key, and value name used to store a boolean variable which determines if the user does not want this message box shown. The third parameter is the default return value, which will be returned immediately if the message box is not shown. Next is the text for the check box, then the message box text itself, the title, button code, and icon code.


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

Mike Scanlon
Web Developer
United States United States

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Comments and Discussions

QuestionMessage box only runs once even without checkbox checked Pin
BMarik21-Jan-14 5:19
memberBMarik21-Jan-14 5:19 
BugMy chkMessageBox has 2 colors? Pin
Member 1001584128-Apr-13 11:35
memberMember 1001584128-Apr-13 11:35 
GeneralRe: My chkMessageBox has 2 colors? Pin
Proshuto19-Jun-13 23:45
memberProshuto19-Jun-13 23:45 
GeneralRe: My chkMessageBox has 2 colors? Pin
Member 103232869-Oct-13 8:29
memberMember 103232869-Oct-13 8:29 
QuestionRe: My chkMessageBox has 2 colors? Pin
Johnny J.19-Sep-14 1:33
professionalJohnny J.19-Sep-14 1:33 
AnswerRe: My chkMessageBox has 2 colors? Pin
RGDSoftware23-Jun-15 12:52
professionalRGDSoftware23-Jun-15 12:52 
GeneralThere is a WinApi function what does it ! Pin
adata210-Feb-11 9:57
memberadata210-Feb-11 9:57 
GeneralRe: There is a WinApi function what does it ! Pin
hype891230-Nov-12 3:24
memberhype891230-Nov-12 3:24 
Generalrendering problems sometime Pin
Sergey Kolomenkin17-Mar-09 2:48
memberSergey Kolomenkin17-Mar-09 2:48 
Generalsource code Pin
stadelmann-peter17-Dec-08 6:32
memberstadelmann-peter17-Dec-08 6:32 
GeneralRe: source code Pin
donor23-Dec-08 4:52
memberdonor23-Dec-08 4:52 
GeneralRe: source code Pin
Member 113944985-Jul-15 5:38
memberMember 113944985-Jul-15 5:38 
GeneralWhere do I find the MsgBoxCheck.dll file Pin
Glade Ross14-Jul-08 11:02
memberGlade Ross14-Jul-08 11:02 
GeneralRe: Where do I find the MsgBoxCheck.dll file Pin
Hantou30-Apr-09 10:40
memberHantou30-Apr-09 10:40 
GeneralRe: Where do I find the MsgBoxCheck.dll file Pin
Member 1001584128-Apr-13 11:25
memberMember 1001584128-Apr-13 11:25 
GeneralParameter to set the default button please Pin
SuperCoder!19-Jun-08 3:16
memberSuperCoder!19-Jun-08 3:16 
QuestionVista Problem Pin
Turulo10-Apr-08 9:33
memberTurulo10-Apr-08 9:33 
AnswerRe: Vista Problem Pin
SuperCoder!19-Jun-08 3:11
memberSuperCoder!19-Jun-08 3:11 
GeneralLicense Attached Pin
rsbiz200426-Mar-08 1:07
memberrsbiz200426-Mar-08 1:07 
QuestionAnd in vbnet ? Pin
scalpa9822-Sep-07 8:31
memberscalpa9822-Sep-07 8:31 
AnswerRe: And in vbnet ? Pin
rsbiz200424-Mar-08 2:44
memberrsbiz200424-Mar-08 2:44 
GeneralRe: And in vbnet ? Pin
BMarik21-Jan-14 10:34
memberBMarik21-Jan-14 10:34 
Questionhow to use this from a visual c++ sln? Pin
laura_glow13-Jun-07 10:06
memberlaura_glow13-Jun-07 10:06 
Generalimplementation to HTML Pin
jameo186-Jun-07 3:48
memberjameo186-Jun-07 3:48 
GeneralMsgBoxCheck.dll source code or reg path Pin
wilsoada13-Dec-06 12:37
memberwilsoada13-Dec-06 12:37 

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