Board index » cppbuilder » Why?

2003-07-09 01:08:16 AM
cppbuilder45
Why can I use a data module in a plain unit file? I used an include to
access the querys inside the module, but the compiler can see them. If I use
a unit with a form attached the include statement works. Builder's IDE
allows to include the data module to a form (File/Include unit hdr...), this
option is not avilable with a unit file, so there is a difference somewhere.
How can I use a data module with my unit?
 

"Gonzalo Nieva" < XXXX@XXXXX.COM >wrote:
you want to access members or methods of an other unit, in the
header where the members to be accessed are declared, you need
to make them public:
//-------------------------------------------------------------
class TForm1 : public TForm
{
__published: // IDE-managed Components
TButton *Button1;
void __fastcall Button1Click(TObject *Sender);
private: // User declarations
// Everything in this section is private to the unit
public: // User declarations
// Everything in this section is public
// to access MyQuerry from another unit include this
// header in that unit and use Form1->MyQuerry();
void __fastcall MyQuerry();
__fastcall TForm1(TComponent* Owner);
};
//-------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//-------------------------------------------------------------
~ JD
 

I think You are in the right track, those querys are declared _published:.
Is it safe to chage them to public:?
Thanks for your help.
 

{smallsort}

"Gonzalo Nieva" < XXXX@XXXXX.COM >wrote:
the IDE.
The solution is simple:
//----- in the header ---------
class TForm1 : public TForm
{
__published: // IDE-managed Components
void __fastcall QuerryTheDataClick(TObject *Sender);
private: // User declarations
public: // User declarations
void __fastcall MyQuerry();
__fastcall TForm1(TComponent* Owner);
};
//------------------------------
//------ in the unit -----------
void __fastcall TForm1::QuerryTheDataClick(TObject *Sender)
{
MyQuerry();
}
//-----------------
void __fastcall TForm1::MyQuerry()
{
// code for the actuall querry
}
//-----------------
Now you can access it using Form1->MyQuerry();
~ JD
 

I just remembered something I saw in the manual: All I have to do is to use
the form's variable to reach the published components!. Thanks for your
help.
 

Mike
I try your code but in the following line:
objCDO := CreateOLEObject('MAPI.Session');
I receive the eeror message (EolesysError 'String of class not valid')
also in
objMsg := objCDO.GetMessage(itemOL.EntryID, itemOL.Parent.StoreID);
I cant find the property StoreId of the MailItem.Parent object
--- posted by geoForum on delphi.newswhat.com
 

Reinstall your Outlook
 

I am troubled with problem,
program prog;
uses Unit2;
const a=c;
....
unit unit2
interface
uses unit1
....
unit unit1
interface
const c=1
....
compiler show error:Undeclared identifier:'c'
why?Do delphi support this ?
 

On 17 Feb 2004, "weiwi" < XXXX@XXXXX.COM >wrote:
visible to the main program. You'd have to add unit1 to the program uses
clause to achieve that.
--
-Mike (TeamB)
 

weiwi wrote:
 

thanks, Mike and Aniket.
"weiwi" < XXXX@XXXXX.COM >дÈëÓʼþ news:40323e41$ XXXX@XXXXX.COM ...

"weiwi" < XXXX@XXXXX.COM >wrote
you would put the subject of the problem in the
subject line of the post. Regards, JohnH
 

I Use SQL Server. And I have compared BDE with ADO. But I feel, Quicker BDE
than ADO when loading data. Though most people telling nicer ADO. Can You
explain about it? Do I wrong to set at ADO's properties? or What?
 

Adi,
ADO speed tips...
bdn.borland.com/article/0,1410,27790,00.html
Avoid using the BDE against MSSQL 7/2000 because...
community.borland.com/article/0,1410,28688,00.html
community.borland.com/article/0,1410,10359,00.html
community.borland.com/article/0,1410,19694,00.html
support.microsoft.com/default.aspx
If your coming from a desktop db background, check out...
bdn.borland.com/article/0,1410,28160,00.html
www.logicfundamentals.com/pages/BrowsingLargeTables.aspx
www.logicfundamentals.com/pages/TablesVsQueries.aspx
Some good db design advice...
www.hower.org/Kudzu/Articles/DBDesign/index.html
Good luck,
krf
"Bpk. Adi Wira Kusuma" < XXXX@XXXXX.COM >wrote in message

Cuz.
--
Mart
I'm soundtracking my life
To email me, remove clothes
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