how to send to the serial port by using mscomm32.ocx

Slow baud rates and large text strings written to the serial port may mean you need to make this value larger.įollowing is a sample that shows how to set up the comm control and dial the phone number 555-1234 by using the standard Hayes Modem commands. The larger the transmit buffer, the less memory available to other applications. The OutBufferSize property specifies the size of the transmit buffer. Setting the OutBufferCount property to zero will clear the transmit buffer. This should always be zero if the Sthreshold property is zero. The OutBufferCount control returns the number of characters waiting in the transmit buffer. The Sthreshold property specifies the minimum number of characters in the output buffer that are sent. The CommEvent property contains a value that represents the most recent communications event or errors. Other properties that may be also be needed depending on the application are as follows: CommEvent To output the string 'Hello World' to the serial port after the previous properties are set, use the following command: = 'Hello World' The Output property is assigned the string of characters to be sent to the serial port.

Once the previous properties are set to begin using the serial port, you can set this property to true. The PortOpen property specifies a logical value that controls whether or not the serial port is open and active. This property corresponds to 9600 baud, no parity, 8 data bits, and 1 stop bit. By default, the Settings property is as follows: 9600,N,8,1 The Settings property is a character string that contains individual comma-separated values. The Settings property configures the baud rate, parity, data bits, and stop bits for the serial port. Valid values are 1, 2, 3, or 4 depending on the serial ports installed on the computer and their configuration. By default, this property is set to 1 corresponding to com1. A numeric property that corresponds to the Comm port. The CommPort property specifies the communications port number. The most frequently used properties to send data to the serial port using the mscomm control are as follows: CommPort

It can be used on computers that are running Microsoft Windows 95 and later versions of Windows. Mscomm32.ocx ships with Microsoft Visual FoxPro Professional Edition. This article describes the settings necessary to send data to the serial port by using Mscomm32.ocx. Original product version: Visual FoxPro Original KB number: 139526 Summary This article introduces how to send information to the serial port by using the Mscomm32.ocx control.

How to send to the serial port by using mscomm32.ocx