Making a form invisible, but leaving (showing) the controls visible

This involves using the SetWindowLong API function with the following parameters, GWL_EXSTYLE and WS_EX_TRANSPARENT as constants.

the syntax of the function using the paramters is

dim intresult as long

intresult = setwindowlong(me.hwnd, gwl_exstyle, ws_ex_transparent)

this will make the form referenced by me.hwnd transparent so that the background can be seen but the controls can still be accessed.

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Program to Display a Form without a Titlebar. (Hide Title Bar)

Often, an application needs a special window without a title bar, the horizontal
bar at the top of a window that contains the title of the window. For instance, a splash screen or a custom context sensitive menu are nothing more than VB forms without title bars. To make a form appear without a title bar set the following design-time and run-time properties.

Properties that must be set at design-time, they are read-only at
run-time:

ControlBox=False ' Turns off Control-menu: Restore, Move, Size,
Minimize, Maximize, Close
MaxButton=False ' Turns off Maximize button
MinButton=False ' Turns off Minimize button






ShowInTaskbar=False ' Hides window in Taskbar

'Properties that can be set at either run-time or design-time:

Caption="" ' Blanks window title
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Program to Determines the number of workdays within a date range.

I used implicit If Statements (IIF) because they take less lines of code, and this procedure is convoluted enough without making is bigger! In case you aren't familiar with them, they are a hold-over from VBA.
The first argument is the expression, the second is what to do if it's true, the third is what to do if it's false.
The first part determines the number of days between 2 dates. The second part determines the number of whole weeks because each whole week has a Saturday & a Sunday in it.
The last part determines if the range spanned a weekend but not a whole week so it can subtract the weekend out.


Private Sub FindWorkDays()
Dim A1 As Date
Dim A2 As Date
Dim iWorkDays As Integer

A1 = Text1.Text
A2 = Text2.Text

iWorkDays = A2 - A1 + 1 - Int((A2 - A1 + 1) / 7) * 2 - _
IIf(Int((A2 - A1 + 1) / 7) = (A2 - A1 + 1) / 7, 0, _
IIf(WeekDay(A2) <>
IIf((WeekDay(A1) = 1 Or WeekDay(A2) = 7), 1, 0)

Label1.Caption = iWorkDays

End Sub

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How To Pause your application for a length of time without a timer control in vb (Visual basic)

First put this code either in a module as a private function on a form



Public Declare Sub Sleep Lib "kernel32.dll"
(ByVal dwMilliseconds As Long)


Then when you want to pause something just do this

Sleep 1000 'Pause for 1 second


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Visual Basic-6 has emerged as one of the standard Windows Programming Language and it has become a must for all Software people for developing Applications in Visual Environment. So it is, one must learn Visual Basic-6.

What is our Objective in this Courseware?

The Overall Objective in this Courseware is to give a Hands-on Approach to develop different projects in Visual Basic-6.0 using intrinsic, professional and user–created ActiveX controls and also develop projects using databases, DAO’s, ADO’s, DLL’s, Documents, Crystal Reports etc. covering almost all the essential features of VB-6 Professional Edition. After reading one lesson any interested reader will be able to get complete hands-on experience with the VB project and get a sense of fulfilment and achievement. Learning by doing is the motto with which this courseware is written. After giving a short introduction about VB-6 we will explain how to create and execute a project in VB using some intrinsic ActiveX controls. Creating and executing projects will be the central theme of all the lessons which we will be giving in this courseware.

What is Visual Basic-6?

Visual Basic-6 has its origin in Basic which was developed round about the year 1960, when high level languages were just being introduced to the computer community. Microsoft has made it extremely powerful by gearing all its good features to the Windows environment. Starting with the version 3 and then with 4, and then with 6, Visual Basic is now at version 6. Basic is a Procedure Oriented Language intended to implement single tasks in text based environment whereas Visual Basic is an Event Driven Language intended to implement Projects or Applications containing multiple tasks in Windows Environment.

What can Visual Basic do for you?

Visual Basic can serve as an ideal front end tool for the clients to interact. It has got connectivity mechanisms for all types of databases situated far and wide in a network and so it can cater to the needs of a large body of clients. Using the latest ActiveX technologies, it can integrate the functionalities provided by other applications like Word Excel and other Windows. Its internet capabilities provide easy access to documents and applications across the internet. Above all it embodies the Object Oriented Technology, which is the cutting edge technology for all the present day developments in the Software World. The final application is a true EXE file and so can be freely distributed.


Structure of VB-6 Projects:

We said earlier that VB-6 implements projects or applications. A project is developed using one or more Forms. A Form is simply a window containing one or more Controls. Controls in VB consist of labels, text boxes, list boxes, combo boxes, scroll bars etc. which are the constituents of windows environment. It is only the controls that give VB, its immense power and so there is a lot of interest in creating more and more powerful controls. ActiveX controls mark a significant development in controls technology. In fact all controls in VB-6 are ActiveX controls, which have the extension .ocx. These controls have properties whose values can be initialized at design time and also varied during run time. The properties are something like variables. The controls are activated by codes written in a high level language. By associating our problem variables with the properties of the controls, our problem variables can be manipulated to give the problem solution. In summary we can say that a VB project is made of forms, controls and their properties and codes.

Integrated Development Environment:

The working environment in VB is often referred to as the Integrated Development Environment or IDE, because it integrates many different functions such as design, editing, compiling and debugging within a common environment. Since all our projects are developed only in the IDE, let us now have a brief look at its features. You will be able to understand their uses at the time of building projects. The VB IDE looks as shown in the figure.