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Connecting to Oracle

Question: I have been trying to connect to our Oracle General Ledger Version 10.SC from PB5 Ent. I am accessing it from my PC running Win95 and a database that

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OPO and stored procedure parameters

Question: Stored procedure on WG7.3 Oracle expects three parameters. I can get OPO 2.0 to pass the params if I cite them literally as, for example, exec sql begin addnewperson(‘John’,’Quincy’,’Doe’);

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How to add custom menu and toolbar to report object

Question: I’m using Power Objects 2.1 and am trying to add a custom menu and toolbar toa report object. I’ve successfully done this withform objects by using the InitializeWindow, TestCommand

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Referencing instances of classes

Question: How do classes communicate? If class A created one or more instances of class B and class C, how can class A keep track of all the instances of

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Pop-up list problems

Question: Why can’t I put a simple piece of code in the click event for a list box and have it execute? Also, how can I choose a value from

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OPO 2.0 and mathematic operations

Question: Yesterday I received a description for a reality problem I must represent in my OPO-database application. It concerns the drinking water supply for a city, and the staff of

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Field-level and interfield validations

Question: Field-level validations should be done when the user visits the field. How can this be done?Interfield validations on the same screen also should be done when the user visits

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Cursor position within a window

Question: I have a DB log-on panel defined for my application, and the user ID is loaded from an INI file. I would like to have the cursor on the

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Form width and length

Question: My program has two MDI forms. I have an option that allows the user to tile them horizontally or vertically. How can I tell at runtime what the max

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“Cannot Open Component Library” — What to do

Question: I’ve been getting the following errors when I try to launch Delphi:“This program has performed an illegal operation and will be shut down.If the problem persists, contact the program

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Hiding application

Question: I have a third-party component I am using to make an icon for my app in the Windows 95 system tray. This works great, except that I need to

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Binding a form to multiple data sources

Question: I am trying to bind a form to multiple tables in a session. If I drag and drop an attribute from a single table into my form, all is

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TQuery command to use to execute a SQL statement

Question: I’m trying to delete multiple records using Tquerysuch as delete from products p where p.shopno in (select shopno from shops)When I run the program, it executes the statements and

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Paradox: secondary indexes problem

Question: I have just discovered a problem with secondary indexes in Paradox that I desperately need to have solved by yesterday!I have a number of database tables with a primary

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Delphi 2.0 cursor handling

Question: How can I get the cursor to advance to the next form field after a field has been filled with the maximum number of characters? I am using Delphi

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Maintaining arrays of bindings between names and associated arrays

Question: I have few problems with the following code: abstract class AbstractGraph extends java.awt.Frame { static int HighValue,LowValue,ArraySize; static String InstancesArray[][] = new String [20][ArraySize]; float ReturnArray(String name) { …

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How to convert int to string

Question: I am looking for a generic way to convert an intto a string. It cannot be platform- or compiler-specific in its implementation. Answer: The standard C++ library defines the

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Creating Java packages or library files

Question: I am creating an application by using Symantec Cafe wherein I am using one applet, from which I am calling a series of frames. I have some common functions

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Byte order

Question: How does one find out the byte order of the platformon which JVM is running? For example, for a Java application that has to read a C structure from

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Generic C++ Exception Handling Class

Question: I would like to see an example of a generic C++ exception class that could be used across objects. Answer: When using exception handling, it is often a good