vb.net barcode scan event if KeyDown(kc_LArrow) && KeyDown(kc_RArrow) then GoSub DoSomething in Software

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if KeyDown(kc_LArrow) && KeyDown(kc_RArrow) then GoSub DoSomething
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if KeyDown(37) && KeyDown(38) then GoSub DoSomething
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The function returns a non-zero number if the key is pressed and zero if it is not. ExprN is an integer value representing the code of the key you wish to query. The codes of the keys can be determined as described in the User Interface Commands help page under the command GetKeyE. There is a program segment given there that enables you to determine the code for any key on the keyboard. Most of the alphanumeric keys have a code that is the ASCII code of the UpperCase letter of the key. The shift, Control and Alt keys have the values 16, 17, and 18 respectively. So for example if you wish to nd out if Ctrl+F2 are pressed simultaneously you would have:
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if KeyDown(kc_Ctrl) && KeyDown(kc_F2) then GoSub DoSomething
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The Function keys have the numbers 112 to 123 (F1 to F12). Remember the key code is speci c for each key even if the key has multiple characters printed on it, it will have one code. So the 9key will have the code 57 which is actually the ASCII code for the numeral 9. The Left-Up-Right-Down arrow keys have the codes 37 to 40 in order (see the Constants help page in the IDE). You can also use this function to read the condition of the mouse buttons as if they were keyboard keys. See the Constants help page for their codes. The function can be useful in gaming where a response to more than one key pressed together may be necessary. Also refer to the commands GetKey, and GetKeyE for a discussion on how to handle the speed of response when you do not wish to detect one press as multiple presses.
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VType(Var) This function is used to nd the type of a variable. You specify the variable name. The returned values are: 102 = Ascii( f ) 105 = Ascii( i ) 115 = Ascii( s ) 0 oating-point number integer number string no value, that is, has not been assigned a value
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The values above are also de ned in the constants section (Sec. B.7.6) Float = oating point number Integer = integer number String = string Novalue = not a de ned variable This function can be useful to determine the type of a variable or if it is an unassigned variable. You can check if a variable is valid before it is used. If you try to use an unassigned variable an error will occur. This function can be used to prevent this. Also see IsString(), IsNumber(), ToString(), ToNumber(), and so on.
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Speci er
Represents
Digit place holder. If the value being formatted has a digit in the position where the 0 appears in the format string, then that digit is copied to the output string. Otherwise, a 0 is displayed in that position in the output string. Digit placeholder. If the value being formatted has a digit in the position where the # appears in the format string, then that digit is copied to the output string. Otherwise, nothing is stored in that position in the output string. Decimal point. The rst . character in the format string determines the location of the decimal separator in the formatted value; any additional . characters are ignored. The actual character used as the decimal separator in the output string is determined by the DecimalSeparator global variable. The default value of decimal separator is speci ed in the Number Format of the International section in the Windows Control Panel. Thousand separator. If the format string contains one or more , characters, the output will have thousand separators inserted between each group of three digits to the left of the decimal point. The placement and number of , characters in the format string does not affect the output, except to indicate that thousand separators are wanted. The actual character used as the thousand separator in the output is determined by the ThousandSeparator global variable. The default value of ThousandSeparator is speci ed in the Number Format of the International section in the Windows Control Panel.
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