MFC, Setting Text of Edit Control in Dialog Box of Control Panel Applet

Setting Text of Edit Control in Dialog Box of Control Panel Applet

Author	Message
Thomas Jachman #1 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet I've written a Control Panel Applet including just one dialog box. The dialog box class has been derived from CDialog and there are several controls on it, one of which is a edit control. I want to set the text of this control. So I've done something like: CWnd* intervalLengthLabel; intervalLengthLabel = GetDlgItem(IDC_INTERVAL_LENGTH); if (intervalLengthLabel != NULL) { //OK intervalLengthLabel->SetWindowText("just some text"); Quote: } else { //error AfxMessageBox("Not been able to get EditBox handle"); Quote: } Well, I've used this on several other projects (dialog based applications), no prob. But on this project, it just doesn't return the handle. The error doesn't fall under the category 'misspelled'. I also tried to use it that way GetDlgItem(IDC_INTERVAL_LENGTH, intervalLengthLabel); - well, it didn't work either. The compiler actually didn't know this function though it is in the MSDN documentation. I don't see any difference between the two projects (besides one is a dialog based application and the other is a dll used as cpl) so I don't know what's going wrong... Any suggestions? Thanks for any help cheers, thomas ---------------------------------------------------------------------- my eMail address has been modified I think you can guess what should be removed...
Fri, 09 Mar 2001 03:00:00 GMT

Daxin Chen #2 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet I am not clear where you called GetDlgItem() in your real project. Its return value (CWnd) can not be stored for future use. Just in case you did this way. Daxin Quote: > I've written a Control Panel Applet including just one dialog box. The > dialog box class has been derived from CDialog and there are several > controls on it, one of which is a edit control. I want to set the text > of > this control. So I've done something like: > CWnd intervalLengthLabel; > intervalLengthLabel = GetDlgItem(IDC_INTERVAL_LENGTH); > if (intervalLengthLabel != NULL) > { //OK > intervalLengthLabel->SetWindowText("just some text"); > } > else > { //error > AfxMessageBox("Not been able to get EditBox handle"); > } > Well, I've used this on several other projects (dialog based > applications), > no prob. But on this project, it just doesn't return the handle. The > error > doesn't fall under the category 'misspelled'. I also tried to use it > that > way GetDlgItem(IDC_INTERVAL_LENGTH, intervalLengthLabel); - well, it > didn't > work either. The compiler actually didn't know this function though it > is in > the MSDN documentation. I don't see any difference between the two > projects > (besides one is a dialog based application and the other is a dll used > as > cpl) so I don't know what's going wrong... Any suggestions? Thanks for > any > help > cheers, thomas > ---------------------------------------------------------------------- > my eMail address has been modified > I think you can guess what should be removed...
Fri, 09 Mar 2001 03:00:00 GMT

Matthias Wac #3 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet Maybe define a membervariable. Then, you doesnt have to use GetDlgItem() Thomas Jachmann schrieb in Nachricht ... Quote: >I've written a Control Panel Applet including just one dialog box. The >dialog box class has been derived from CDialog and there are several >controls on it, one of which is a edit control. I want to set the text of >this control. So I've done something like: >CWnd* intervalLengthLabel; >intervalLengthLabel = GetDlgItem(IDC_INTERVAL_LENGTH); >if (intervalLengthLabel != NULL) >{ //OK > intervalLengthLabel->SetWindowText("just some text"); >} >else >{ //error > AfxMessageBox("Not been able to get EditBox handle"); >} >Well, I've used this on several other projects (dialog based applications), >no prob. But on this project, it just doesn't return the handle. The error >doesn't fall under the category 'misspelled'. I also tried to use it that >way GetDlgItem(IDC_INTERVAL_LENGTH, intervalLengthLabel); - well, it didn't >work either. The compiler actually didn't know this function though it is in >the MSDN documentation. I don't see any difference between the two projects >(besides one is a dialog based application and the other is a dll used as >cpl) so I don't know what's going wrong... Any suggestions? Thanks for any >help >cheers, thomas >---------------------------------------------------------------------- >my eMail address has been modified >I think you can guess what should be removed...
Fri, 09 Mar 2001 03:00:00 GMT

Dirk Bohnemeye #4 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet I've never done it in a control panel application, but in a normal DLL you have to deal with the resource handle of the application, because the calling application has its own resources. Try something like AFX_MANAGE_STATE or AfxSetResourceHandle. -- Dirk Bohnemeyer p.s. For e-mail remove one of the 'o's from my address. ------------------------------------------------------- Thomas Jachmann schrieb in Nachricht ... Quote: >I've written a Control Panel Applet including just one dialog box. The >dialog box class has been derived from CDialog and there are several >controls on it, one of which is a edit control. I want to set the text of >this control. So I've done something like: >CWnd* intervalLengthLabel; >intervalLengthLabel = GetDlgItem(IDC_INTERVAL_LENGTH); >if (intervalLengthLabel != NULL) >{ //OK > intervalLengthLabel->SetWindowText("just some text"); >} >else >{ //error > AfxMessageBox("Not been able to get EditBox handle"); >} >Well, I've used this on several other projects (dialog based applications), >no prob. But on this project, it just doesn't return the handle. The error >doesn't fall under the category 'misspelled'. I also tried to use it that >way GetDlgItem(IDC_INTERVAL_LENGTH, intervalLengthLabel); - well, it didn't >work either. The compiler actually didn't know this function though it is in >the MSDN documentation. I don't see any difference between the two projects >(besides one is a dialog based application and the other is a dll used as >cpl) so I don't know what's going wrong... Any suggestions? Thanks for any >help >cheers, thomas >---------------------------------------------------------------------- >my eMail address has been modified >I think you can guess what should be removed...
Sat, 10 Mar 2001 03:00:00 GMT

Thomas Jachman #5 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet I finally made it. The problem was just that I called GetDlgItem right after the construction of the dialog box' class. Ask god why but at this stage, the controls within the associated dialog box weren't known. I then tried to call GetDlgItem from within OnInitDialog (overridden function from CWnd) and stored the return value in a member variable (CWnd*) of the dialog class - though you actually shouldn't store those pointers, it worked for me ... any comments on that? I then could use this pointer from anywhere, eg OnHScroll (in which I needed this reference to the edit field). thanks for your help cheers, thomas ---------------------------------------------------------------------- my eMail address has been modified I think you can guess what should be removed...
Sat, 10 Mar 2001 03:00:00 GMT

Patrice LaRoch #6 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet The CWnd you got in OnInitDialog by calling GetDlgItem can be stored when a couple steps are taken. First that CWnd will exist as long as the HWND under it is still a window, thus until the dialog is opened or until you delete the CWnd pointer you got (which you won't do ...). MFC uses a CMap to map its MFC objects to WIN32 handles, when you delete an MFC object it is flagged for deletion that will be done in the next OnIdle loop. -- Patrice LaRoche, ing. stag., mcp Cybectec inc. WWW: www.cybectec.com Phone: (418) 832-0097, ext 22 Fax: (418) 832-5582 Quote: >I finally made it. >The problem was just that I called GetDlgItem right after the construction >of the dialog box' class. Ask god why but at this stage, the controls within >the associated dialog box weren't known. >I then tried to call GetDlgItem from within OnInitDialog (overridden >function from CWnd) and stored the return value in a member variable (CWnd*) >of the dialog class - though you actually shouldn't store those pointers, it >worked for me ... any comments on that? I then could use this pointer from >anywhere, eg OnHScroll (in which I needed this reference to the edit field).
Sat, 10 Mar 2001 03:00:00 GMT

Harald Berghof #7 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet Quote: > I finally made it. > The problem was just that I called GetDlgItem right after the construction > of the dialog box' class. Ask god why but at this stage, the controls within > the associated dialog box weren't known. > I then tried to call GetDlgItem from within OnInitDialog (overridden > function from CWnd) and stored the return value in a member variable (CWnd*) > of the dialog class - though you actually shouldn't store those pointers, it > worked for me ... any comments on that? I then could use this pointer from > anywhere, eg OnHScroll (in which I needed this reference to the edit field). Why don't you call GetDlgItem in the function where you need the pointer (eg. OnHScroll)? This should work fine and you don't store a pointer which may be invalid. Harald
Sat, 10 Mar 2001 03:00:00 GMT

Dirk Bohnemeye #8 / 8	Setting Text of Edit Control in Dialog Box of Control Panel Applet It is normal, that no dialog item is available after construction. The items will be created during the create process, and this takes place by calling Create() or DoModal(). -- Dirk Bohnemeyer p.s. For e-mail remove one of the 'o's from my address. ------------------------------------------------------- Thomas Jachmann schrieb in Nachricht ... Quote: >I finally made it. >The problem was just that I called GetDlgItem right after the construction >of the dialog box' class. Ask god why but at this stage, the controls within >the associated dialog box weren't known. >I then tried to call GetDlgItem from within OnInitDialog (overridden >function from CWnd) and stored the return value in a member variable (CWnd*) >of the dialog class - though you actually shouldn't store those pointers, it >worked for me ... any comments on that? I then could use this pointer from >anywhere, eg OnHScroll (in which I needed this reference to the edit field). >thanks for your help >cheers, thomas >---------------------------------------------------------------------- >my eMail address has been modified >I think you can guess what should be removed...
Sun, 11 Mar 2001 03:00:00 GMT

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