When you create the visual components that make up a user interface, their size and position are usually constant. However, it’s sometimes necessary to change a component’s size or position dynamically based on some user action. For example, your application may change the text in a label that is already
Question: I have two drop-down menus. How do I set a validation on my page so that users cannot go all the way to the server if they don’t select something in both drop-down boxes? Here is the code I’ve been working with: Vessels Select a vessel: Select type of
Question: I have a page with two drop-downs and two corresponding radio buttons. When I choose an item from one drop-down, I’d like the corresponding radio button to become checked. The drop-downs are actually ActiveX controls (ActiveCalendar 2.0) and have several events associated with them (onchange, onlostfocus, and so on).
Question: I built a Web site for my company using FrontPage 98 and can not seem to upload it back to the Internet. I get error messages about server extensions. What is the problem? I have AOL and use PrimeHost as our Internet Service Provider (ISP). Answer: FrontPage uses code
VB5 provides interface inheritance through the use of the Implements keyword. For example, CFullTimeEmployee can implement the IEmployee interface. This interface might include basic information such as name, social security number, and date of birth. Another class, CPartTimeEmployee can also implement the IEmployee interface. You can then write code against
Here’s a demo for using a Label control as a splitter between two controls, as well as sample code for employing the splitter in an Explorer-like application: Option ExplicitPrivate mbResizing As Boolean ‘flag to indicate whether mouse left ‘button is pressed downPrivate Sub Form_Load() TreeView1.Move 0, 0, Me.ScaleWidth / 3,
Select Case statements can lead to errors when the test expression in the Select Case line doesn’t yield a true result for any of its individual Case expressions. Therefore, you should always use a Case Else as the final Case within a Select Case statement. This sample raises a custom
Consider these two examples of code that add a string to a textbox. Example 1: Text1.text = Text1.text & MyString Text1.SelStart = Len(Text1.text) Example 2: Text1.SelStart = Len(Text1.text) Text1.SelText = MyString In the first example, you must copy the complete text from the textbox into a separate buffer to perform
VB6 comes with an ActiveX control named MSWLESS.ocx (“Microsoft Windowless Controls 6.0”), which contains lightweight equivalents for these standard controls: WLTextWLFrameWLCommandWLCheckWLOptionWLComboWLListWLHScrollWHVScroll The controls have lower resource consumption than their regular counterparts, as well as better performance. Because they don’t have windows, they don’t have handles or DDE capability, and they