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Excel vba serial port mscomm vb6
Excel vba serial port mscomm vb6








  1. EXCEL VBA SERIAL PORT MSCOMM VB6 SERIAL
  2. EXCEL VBA SERIAL PORT MSCOMM VB6 CODE
  3. EXCEL VBA SERIAL PORT MSCOMM VB6 WINDOWS 7

EXCEL VBA SERIAL PORT MSCOMM VB6 WINDOWS 7

After moving to access 2007 and windows 7 of course, the mscomm control no longer works. It uses a MSComm control to read data from a scale. I have a legacy access 2000 database that has been in successful use for over 10 years.

EXCEL VBA SERIAL PORT MSCOMM VB6 SERIAL

In this case, the intPortID variable specifies that we deal with COM1, and the data to be sent is stored in the strData variable (the string looks funny because it is a command string for a programmable power supply we have in the lab it basically interrogates the power supply regarding its unique identification number).This is actually a continuation of a post already started relative to serial communications. 1, 2, 3, 4 for COM1 - COM4 Dim lngStatus As Long Dim strData As String intPortID = 1 strData = '.IDN? ' 'Writa data lngStatus = CommWrite(intPortID, strData) End Sub This actually calls the CommWrite function, which takes two parameters: the number of the COM port to write to (it has to be the same like for the one you have opened with the previous CommOpen function) and a string of characters that will be sent to the serial port.

EXCEL VBA SERIAL PORT MSCOMM VB6 CODE

The code for this function should be as follows: Private Sub CommandButton2Click Dim intPortID As Integer ' Ex. Once you completed this function, go back to the excel sheet, and by the same process of right-clicking and choosing the View Code option, create the function for the second button, the one with the “Write” label written on it. The lngStatus variable will contain the value returned by the CommOpen function, and will indicate if the port was successfully open or if any error was encountered. The number of the COM port is specified by the value assigned to the intPortID variable. 1, 2, 3, 4 for COM1 - COM4 Dim lngStatus As Long intPortID = 1 ' Open COM port lngStatus = CommOpen(intPortID, 'COM' & CStr(intPortID)'baud=9600 parity=N data=8 stop=1') End Sub It opens COM1, at a baud rate of 9600, no parity, 8 data bits and one stop bit. The code for realizing this is: Private Sub CommandButton1Click Dim intPortID As Integer ' Ex.

excel vba serial port mscomm vb6

For this, we will be using the CommOpen function, defined above, which takes as parameters the ID of the COM port you want to open (COM1, COM2 etc) and a few strings that define the baud rate, the parity and the number of data and stop bits. In order to do this, click on the first button you created, and from the pop-up menu, choose the View Code option: This will open again the scripting environment, adding a new function to the code it will mark the beginning of the function: Private Sub CommandButton1Click End Sub This is the place where you will write the code to initialize the serial port. Now it is time to start adding code to your buttons.

excel vba serial port mscomm vb6 excel vba serial port mscomm vb6

This will change the label on the first button to this very text: Once you do this for the first button, repeat the operation and change the labels on the other three buttons to “Write”, “Read” and “Close”. Click on the Command Button control from the recently activated toolbar, and then draw 4 similar buttons anywhere on the surface of your excel worksheet (it will be a challenge to draw them all of the same size!). In order to do all these, you will need to create four windows-style buttons, each of them performing one of the tasks that I have enumerated before. As a goal for this article, I would intend to demonstrate how you open the serial port, how you write a few bytes, how you read some bytes, and then how you close the serial port. This will, in turn, make available a number of new other buttons that will allow you to build the mentioned controls. In order to make these available on the main toolbar, you need to activate the Control Toolbox button, from the small toolbar activated at the previous step. These buttons will enable you to launch the editor in which you will be able to write the Visual Basic Code and will also allow you to directly create windows-style controls like textboxes, push buttons, labels, radio buttons, checkboxes etc.










Excel vba serial port mscomm vb6