Bluebit Software Support Forum / Technical Support and Help / General

C++ Builder 6 - Printing

Rowin — Thu, 06 Apr 2006 06:52:55 GMT

How to print using codes in C++ Builder?

C++ Builder 6 - Password

Rowin — Tue, 24 Jan 2006 08:46:15 GMT

When using a datamodule and a database (Tdatabase), how can I retrieve the password that I set in the login prompt? I can retrive the username by:ShowMessage(DataModule1->DatabaseProjectTracking->Params->Values["User Name"]);But for the password it's not working.

C++ Builder 6 - Getting a value from a DBGrid

Rowin — Thu, 01 Jun 2006 10:10:11 GMT

Hi,How can I do the following?I have a DBGrid and I need to get values that grid. When I click on a cell in the grid, I need to get all values in the selected row.If for example there are 3 columns named ID, name and age.If I click a cell in the grid, the value for the Id is displayed in a textbox, the value for name in another one and also the value for age in another textbox.That is I need to display individual column values for the selected row in a text box for each one.Can anyone help me?Thanks.Rowin

C++ Builder 6 and Crystal Report

Rowin — Wed, 26 Apr 2006 04:36:27 GMT

Hi,I have an C++ Builder application. I want to print a report with the values appearing in my application. I get these values from my database. I already have a crystal report format of how the report should be printed.How to do this?Kind Regards,Rowin

C++ Builder 6 - DBGrid

Rowin — Thu, 13 Apr 2006 05:47:10 GMT

Hi,How to count the number of rows in a DBGrid? There are not such methods or properties as RowCount. Kind Regards, Rowin

C++ Builder 6 - Opening a File

Rowin — Mon, 03 Apr 2006 03:17:57 GMT

How to open a file (for reading) in C++ Builder using codes?

C++ Builder 6 - controlling the main form

Rowin — Mon, 30 Jan 2006 07:17:41 GMT

Hi,Can anybody tell me how to control the main form. I want to make the main form appear depending on a check that i am going to make. For example when running the exe, i need to check first if the username and password is already present in the Registry. If it is present then i wont show the login. If the login is not correct, i shouldn't get the main form but the login again.In which event of the main form should i do this check so as to make the main form appear depending on the result of this check?

C++ Builder 6 - Datamodule

Rowin — Thu, 19 Jan 2006 07:39:16 GMT

When using a datamodule and a database (Tdatabase) how can I set the User Name and Password by codes?Eg: DataModule->Database->.......Rowin

C++ Builder 6 - read\write to registry

Rowin — Wed, 18 Jan 2006 08:51:09 GMT

How to read\write to registry using codes? Rowin

C++ Builder 6

Rowin — Thu, 12 Jan 2006 05:10:23 GMT

Using C++ Builder 6, how do i get the login name and password that I have set to create a DSN.(I must do this using codes)

How to give Focus in form using DLL inside other D

horacyjr — Mon, 12 Dec 2005 06:43:55 GMT

i am using a ddl to call other dll to show a form, that´s ok.But the problem is, i can not give the focus to the form, if there are more forms or programs opened the form that i call stay under the others , i want it to apears in front of all the others things opened,i have already used ShowModal but it does not work, can you help me, i am using C++ Builder(Borland) in windows 2000.tks

A High Resolution Performance Timer

Trifon — Mon, 02 May 2005 11:06:44 GMT

We publish here some code for a high resolution performance
timer that can be used to measure the performance of your code
to nanosecond accuracy.

The code is beased on this article [url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag/html/scalenethowto09.asp[/url]
but it has been modified so that the timer can be started and
stopped many times and its Duration property will return the
cumulative elapsed time that the timer has been running.

Normally you will use the PerformanceTimer class as follows:

Create a new instance of the PerformanceTimer class.
Call the StartTimer method.
Execute any code you need to measure its duration in time.
Call the StopTimer method.
Read the Duration property to get the cumulative elapsed time the timer has been running.
You may also read this property while the timer is running.
Call the Reset method to set the Duration property to 0.

[code]using System;
using System.Runtime.InteropServices;

namespace Bluebit.Utility
{
/// <summary>The %PerformanceTimer% class can be used to measure intervals of time.</summary>
/// <remarks>
/// <para>Normally you will use the PerformanceTimer class is as
/// follows:</para>
/// <list type="bullet">
/// <item>Create a new instance of the %PerformanceTimer% class.</item>
/// <item>Call the
/// <a href="Bluebit.Learning~Bluebit.Utility.PerformanceTimer~StartTimer.html">StartTimer</a>
/// method.</item>
/// <item>Execute any code you need to measure its duration in time.</item>
/// <item>Call the
/// <a href="Bluebit.Learning~Bluebit.Utility.PerformanceTimer~StopTimer.html">StopTimer</a>
/// method.</item>
/// <item>Read the
/// <a href="Bluebit.Learning~Bluebit.Utility.PerformanceTimer~Duration.html">Duration</a>
/// property to get the cumulative elapsed time the timer has been running. You may
/// also read this property while the timer is running.</item>
/// <item>Call the
/// <a href="Bluebit.Learning~Bluebit.Utility.PerformanceTimer~Reset.html">Reset</a>
/// method to set the
/// <a href="Bluebit.Learning~Bluebit.Utility.PerformanceTimer~Duration.html">Duration</a>
/// property to 0.</item>
/// </list>
/// </remarks>
public class PerformanceTimer
{
/////////////////////
#region PRIVATE FIELDS
private long _freq; // internal performance-counter frequency, in counts per second
private long _bias; // the time it takes to execute a StartTimer and a StopTimer command.
private long _start; // last time the timer was started
private long _stop; // last time the timer was stopped
private long _duration; // cumulative elapsed time.
private bool _running; // current state of the timer.
#endregion
/////////////////////
#region EXTERNAL DECLARATIONS
[DllImport("kernel32.dll")]
extern static short QueryPerformanceCounter(ref long x);
[DllImport("kernel32.dll")]
extern static short QueryPerformanceFrequency(ref long x);
#endregion
/////////////////////
#region CONSTRUCTOR
/// <summary>Creates a new instance of the %PerformanceTimer% class</summary>
public PerformanceTimer()
{
QueryPerformanceFrequency(ref _freq);
if (_freq == 0)
throw new ApplicationException("The installed hardware does not support a high-resolution performance counter.");

// calculate the _bias; the first result maybe inaccurate
StartTimer();
StopTimer();
StartTimer();
StopTimer();
_bias = _stop - _start;
_duration = 0;
}
#endregion
/////////////////////
#region PUBLIC METHODS
/// <summary>Starts the timer.</summary>
public void StartTimer()
{
if (!_running)
{
_running = true;
QueryPerformanceCounter(ref _start);
}
}

/// <summary>
/// Stops the timer.
/// </summary>
public void StopTimer()
{
if (_running)
{
QueryPerformanceCounter(ref _stop);
long d = _stop - _start - _bias;
d = (d > 0) ? d : 0;
_duration += d;
_running = false;
}
}
/// <summary>
/// Resets the timer.
/// </summary>
/// <remarks>
/// The %Reset% method sets the %Duration% of the timer to zero. If the timer is
/// running it is stopped.
/// </remarks>
public void Reset()
{
if (_running) StopTimer();
_duration = 0;
}

#endregion
/////////////////////
#region PUBLIC PROPERTIES
/// <summary>Gets the cumulative elapsed time the timer has been running.</summary>
/// <value>
/// A %System.Double% representing the number of seconds the timer has been
/// running.
/// </value>
public double Duration
{
get
{
if (_running)
{
QueryPerformanceCounter(ref _stop);
long d = _stop - _start - _bias;
d = (d > 0) ? d : 0;
return (double)(_duration + d) / (double)_freq;
}

return (double)_duration / (double)_freq;
}
}
/// <summary>
/// Gets the current performance-counter frequency, in counts per second.
/// </summary>
public long Frequency
{
get { return _freq; }
}

/// <summary>
/// Gets the current state of the timer.
/// </summary>
/// <value>
/// true if timer is running, false if timer is
/// stopped.
/// </value>
/// <remarks>
/// The %StartTimer% method sets this property to true whereas the
/// %StopTimer% method sets it to false
/// </remarks>
public bool IsRunning
{
get { return _running; }
}
#endregion
/////////////////////
}
}[/code]

c++ builder 6.0 + mysql

angausaita — Tue, 12 Apr 2005 04:26:15 GMT

Hello,Anybody knows how can I connect a MySql DB in builder c++ 6.0 with ODBC connection?Where I can find information about this?Thanks in advance, angausaita