Visual Basic

Beginning Visual Basic 6 Database Programming - download pdf or read online

By John Connell

ISBN-10: 1861001061

ISBN-13: 9781861001061

Visible easy 6 is the hot liberate of the Microsoft's best home windows programming instrument. There are over 3.2 million present clients of visible easy on the earth, starting from newbies to programming to skilled builders. visible simple five offered over 1m copies in 1997, a rise of over forty% over the former year's revenues. this can be a huge class that's on an exponential development curve. Microsoft estimate that 70% of all improvement that's performed with VB is database comparable. it is the best software for constructing all database entrance ends, either to new functions, and to legacy structures. Beginning visible uncomplicated 6 Database Programming is out simultaneously with the recent liberate of VB6, it makes use of an identical profitable instructional structure as starting VB protecting every thing from database layout, to SQL to patron server all at a quick speed. There are functional palms on examples which are usable correct from the e-book and it makes use of DAO to give an explanation for the fundamentals of database programming in lucid educational layout. additional to all this can be the truth that it additionally covers new ADO expertise intensive.

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Extra resources for Beginning Visual Basic 6 Database Programming

Example text

TabIndex = 0 End Sub Note that if Text1 isn't able to receive the input focus (for example, its TabStop property is set to False), Visual Basic automatically moves the focus on the next control in the Tab order sequence, without raising any error. The drawback of this second approach is that it affects the Tab order of all other controls on the form. The ZOrder Method The ZOrder method affects the visibility of the control with respect to other overlapping controls. You just execute this method without any argument if you want to position the control in front of other controls; or you can pass 1 as an argument to move the control behind other controls: ' Move a control behind any other control on the form.

Both scroll bar controls raise the Change event when the user clicks on either arrows or moves the scroll boxes. The Change event is also supported by the PictureBox, DriveListBox, and DirListBox controls. The Change event also fires when the contents of the control are changed through code. This behavior often leads to some inefficiencies in the program. For instance, many programmers initialize the Text properties of all TextBox controls in the form's Load event, thus firing many Change events that tend to slow down the loading process.

This feature can often be exploited to reduce the amount of code you write to enable or disable a group of related controls. TIP Most controls change their appearance when they're disabled. Generally speaking, this is a useful practice because the user can understand at first glance which controls he or she can act on. If you have a good reason to disable a control but still display it in an active state, you can place the control inside a container (a Frame or a PictureBox, for example) and then set the container's Enabled property to False.

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Beginning Visual Basic 6 Database Programming by John Connell


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