🚀 go-pugleaf

I have put the entire code which incorporates the "TDBEedit" line into a new 
VCL FORMS
project as you suggested and it builds correctly. However when I put the 
same code
into a new DLL project it gives the linker error.
It also gives the same error for TDBComboBox, TDBLookupComboBox and 
TDBRadioGroup.
"#include <DBCtrls.hpp>" line is included.

This is one of a number of DLLs I wrote which incorporate generic data entry 
and
other routines and I have being using these without problems in various 
projects
for a number of years.

Michael Corby

"Leo Siefert" <lIHATESPAMsiefert@senate.michigan.gov> wrote in message 
news:egdp64pkvj2ufp2cj6uuj92530sfdoe3qk@4ax.com...
> Michael Corby wrote:
>
>>static_cast<TDBEdit*>(fName->Components[n])->ReadOnly = false;
>>
>>[ILINK32 Error] Error: Unresolved external '__fastcall
>>Dbctrls::TDBEdit::SetReadOnly(bool)'
>>referenced from C:\USERS\PUBLIC\DOCUMENTS\RAD
>>STUDIO\PROJECTS\DLLFILES\DEBUG_BUILD\DLLFORM.OBJ
>
> The fact that you have a linker error shows that your code has been
> compiled without errors.
>
> The linker error indicates that it is unable to locate the VCL library
> module containing the code for the DBEdit control.
>
> If you have imported the project from an earlier version of C++
> builder you should check the imported library paths to make sure that
> they are correct.
>
> If this happens in a new project, then either you have overridden the
> default settings of the IDE or the install is bad.
>
> I tested the type of code you are using in a simple project by
> dropping a TDBEdit control on the form and adding an OnClick handler
> with this code:
>
> void __fastcall TForm3::DBEdit1Click(TObject *Sender)
> {
> static_cast<TDBEdit*>(Sender)->ReadOnly = false;
> }
>
> The project builds correctly.
>
> You could try doing the same in your copy of C++ Builder 2007. If that
> works (if it links with no errors) then you know that the problem is
> somewhere in the project file for the project that does not work. If
> that fails, then I suggest that you either uninstall and reinstall C++
> Builder or perform a repair install to try to correct the problem.
>
> If the problem is in your project settings, you can compare the paths
> and the list of runtime packages in the project options dialog for
> your old project against those in the one that works. Or, you can just
> create a new project and add to it the files from your old project.
>
> BTW - it is safer (but slower) to use a dynamic_cast<> than a
> static_cast<> in situations like this unless you are certain that your
> code ensures that only TDBEdit pointers can be contained in the array.
> If only TDBEdit pointers can be in the array, then it would be cleaner
> and more transparent to declare it as an array of TDBEdit pointers and
> avoid the cast altogether. A cast is often a sign that your code can
> be improved.
>
> - Leo