Loading and Unloading Forms in Visual Basic 6 (VB6). Visual Basic projects have a special object that can be automatically loaded when. This object is referred to as the Startup object. Figure 4. 2. 0. shows an example of a Startup object. The Startup object can now vary depending. ![]() A form can be selected, the Sub Main. VB5 and VB6—nothing. You would specify Nothing. An example of this type of project. Active. X component or an Active. X control. No other form loads. Use the Load statement to load a form into. The Load. statement will take only one argument: the name. Take a look at the. Load Form. 1Load frm. Test. FIGURE 4. 2. Selecting the project Startup object. The Load statement in both cases accepts a. This causes the object to.
![]() Although the object loads. This enables the. Once loaded into memory, the form's controls. When working. with forms in VB, it is important to note that. The Load statement does not have to. There is. no Load statement before the Caption property. This code directly sets the form's. This single line of code automatically. An article on updating Windows application through the web.; Author: Eduardo Oliveira; Updated:; Section: VB.NET; Chapter: Languages; Updated. Run an external Command, returning an object. Syntax objShell.Exec (strCommand) Key objShell A WScript.Shell object strCommand The Command to be executed Unlike.Run method.Exec returns an object. ![]() Form. 1 object to be loaded into memory. Implied loading can often cause problems when. The programmer. does not notice that one form calls or sets. The form then automatically. Later when you attempt to unload by name. The End statement can be used to force the. This is a fail- safe in case the program missed. However, the End statement will have an undesirable. Query. Unload and Unload events. For a more acceptable method to unload all forms, see the section in this. This will release. The following code unloads two forms: Unload Form. Unload frm. Test The Unload statement accepts a valid object. This causes the design time graphic components. Although the form. Public procedures or variables. The. graphical controls are no longer available. Public members of the form can still. Remember, a form's Public procedures. Of course what's just been. Public variables also goes for a form's. Custom Properties implemented with Property. Get and Property Let/Set procedures. Load and Unload are used to control the memory. These two statements always. After you unload a form, the form's. Public procedures and its Public variables will. To completely. reset the contents of these elements, call the. Set Form. Name = Nothing in your code just after calling the Unload statement. Creating Data Input Forms and Dialog Boxes topics. UDP Send and Receive using threads in VB. NETThis article describes how to send and receive data without making the user interface to halt, in VB. NET using UDP. Introduction. When I first started with network programming I was unable to get a clean networking project without all the advanced stuff, that is why I'm submitting this. This article introduces how to use UDP/IP to send and receive data between two computers in a network. This also demonstrates the use of threads to send and receive data so that the user interface doesn't get stuck while sending and receiving data. In the receive program there is a cool section which converts the received message to bit format. That is also a simple technique which anybody can understand. Anybody can use this program in a fair manner. And if you want to add more advanced features feel free to ask. I'm also going to submit a TCP/IP VC++. NET version of this program so that it may be more useful to you. Background. This program uses Udp. Client to send and receive data. This means that it uses the User Datagram Protocol to communicate. The main advantage of UDP is that it works three times faster than TCP. But beware if you are using an unreliable network, data loss can occur. Using UDPWhen using UDP in VB. NET you must first create a Udp. Client like this. Make sure you import Imports System. Net. Sockets in the project: Dim udp. Client As. New Udp. Client. How to send. Dim GLOIP As IPAddress. Dim GLOINTPORT As. Integer. Dim byt. Command As. Byte() = New. Byte() . In VB. NET we use IPAddress. Parse(. Of course getting the port is as simple as assigning the value. Then we use the Udp. Client. Connect(hostname as String, port as integer) to connect. Then comes the tricky part, converting the string message to the Byte() format. Once you do this, you just have to use the Udp. Client. Send() method to send the data and it will pass an integer value indicating the number of bytes send. How to receive. Public receiving. Udp. Client As Udp. Client. Public Remote. Ip. End. Point As. New . The code starts the thread to receive so that the interface doesn't get stuck by waiting for the receive. The thread assigns Receive. Message function to do the receive process. Here is the basic coding in the Receive. Message function: Dim receive. Bytes As . As you can see in the coding the IPEnd. Point is configured so that it will receive from any IP address. The receiving port is assigned during the thread calling time. This also demonstrates the conversion of Byte() to String so that you can do whatever you like with the received message. How to get the bit details. For j = 0. To Bit. Det. Length - 1. If Bit. Det(j) = True. Then. Console. Write(. Make sure that the Multiline property of the text box is set to True. Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.
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