![]() Dave, Can we not use something like the following @Select(Date\Value) = CASE WHEN @Prompt(’Select a Time Period’,'A’,'Date\Value’,mono,free,not Microsoft Access VBA Tip: Use the NZ() NullToZero Function to Handle Null Values Behavior of Null Values in Equations (Expressions) Any arithmetic calculation in VBA. ![]() It can be confusing to know which of these terms to use. They all mean different things, and are not the same as 0 (zero) or "" (a zero. How can i update any field value through VBA code in ms access. Ken's VBA Code for Various Functions. Return to VBA Code Main Page. AccessAndJetErrorsTable. AdjustDateToOneYearWindow. To add an item to a folder in a shared mailbox, use Items.add: Set objAppt = newCalFolder.Items.Add(olAppointmentItem) Default Folder Names. The following are the. ACCESS VBA Functions. Ken's VBA Code for Various Functions. Return to Home. Return to VBA Code Main Page. Add Field With Vba And Set Default Value To Null SomethingAccess. And. Jet. Errors. Table. Adjust. Date. To. One. Year. Window. Break. Text. At. XCalculate. Age. Change. Link. Path. Compact. Backend. Database. File. For example, if today's date is. January 2. 2, 2. 00. January 1, 2. 00. January 1, 2. 00. This function is useful for identifying. The function then returns the modified. Public Function Break. Text. At. X(var. Original As Variant, . It is used to calculate an age in years, based on either today's date or on. Public Function Calculate. Age(DOB As Variant, Optional v. Date As. Variant) As Variant' Author: Arvin Meyer, 5/1. Ken Snell. 9/8/2. Notes: Age calculated as of v. Date, or as of today if v. Date is missing' Arguments: ' DOB (Variant)' v. Date (Optional) (Variant)' Returns: ' Age in years, for a person whose Date Of. Birth is DOBIf Is. Date(v. Date) = False Then v. Date = Date. If Is. Date(DOB) = True Then. Calculate. Age = Date. Diff(. The function does this by dropping the linked table. Public Function Change. Link. Path(str. New. Path As String) As String. Dim dbs As DAO. Database Dim str. Tbl. Name As String Dim col. Tbl As Collection Dim int. Tbl As Integer If str. New. Path < > . If the value provided to the. Keep. Backup is True, a backup copy of the original, uncompacted. Although its original. ACCESS. database file that is not currently being used by anyone. The function returns. ACCESS database file is in use (no. ACCESS database cannot be found (no compaction was done); or 2 if an error. Public Function. Compact. Backend. Database. File. It is used to create a concatenated string. The records to be included, plus the field to be used for. SQL statement that is. The SQL statement passed to the function must return. The values in the. Public Function Concatenate. Field. Values(pstr. SQL As String, . The. NOTE: This function uses two. Get. Last. Day. Of. Month and Get. Month. Name - - both. of which are posted on this web page. You will need to include those functions. Public Function Convert. Month. Name. To. Date. Last. Day( . The search. Case parameter that is passed to the. True for case- sensitive search, False for. If the bln. Case parameter is not supplied to the. Public Function Count. Character. Occurrence(By. Val str. String As. String, By. Val str. Char As String, . The search. performed within the function can be case- sensitive or case- insensitive. Case parameter that is passed to the. True for case- sensitive search, False for. If the bln. Case parameter is not supplied to the. Public Function Count. String. Occurrence(By. Val str. String As String. Parameters for the function are the year for the desired date, the number. January, 2 = February, etc.) for the desired date, the. Sunday, 2 = Monday, etc.) for the. For example, if you want to know the date of the second. Wednesday of May in 2. Date. For. Fixed. Day. Of. Month. Year(2. May 1. 1, 2. 00. 5. This function is useful for identifying dates for. Tuesday of every month). Public Function Date. For. Fixed. Day. Of. Month. Year(Day. For example, if you want to know the. Sunday in the same calendar week as the date of June 1. Wednesday in that calendar week), the call to the function would be Date. Of. Specific. Week. Day(#6/1. 0/2. 00. June 7, 2. 00. 9. Public Function Date. Of. Specific. Week. Day(By. Val Original. Date As Date. . This is helpful when using the string in a . Public Function Double. QDouble(By. Val xstr. Replace. String. Value As. String) As String. Double. QDouble = Replace(xstr. Replace. String. Value, . The function returns a value of - 1 if an integer. NOTE: This function uses one additional. Get. Month. Name - - which is posted on this web page. You will. need to include that function in your database in order to use this function. Public Function Get. Last. Day. Of. Month(By. Val var. Month As Variant. By. Val int. Year As Integer) . The format of the month name can be . The function returns a value of . The format ' of the month name can be . If no value ' or an invalid value is provided for the int. Month. Format parameter, ' the function will return the month name in the . This is helpful when using the string in a . Public Function Single. QDouble(By. Val xstr. Replace. String. Value As. String) As String. Single. QDouble = Replace(xstr. Replace. String. Value, ? This is helpful when using the string in a . This function should not be used when doing a . Its use is for text strings that are used as parameters. WHETHER USER IS STILL CONNECTED TO THE. DB (USER ID' REMAINS IN . LDB. FILE UNTIL LAST USER EXITS OR' UNTIL THE SLOT IS. CLAIMED BY ANOTHER USER)' (. WHETHER USER'S CONNECTION TERMINATED. UNDER NORMAL' CIRCUMSTANCES (. You have to use a GUID to' reference the schema, as provider- specific schemas are not' listed in ADO's type library for schema rowsets. Set rs = cn. Open. Schema(ad. Schema. Provider. Specific, . Using Variables in Excel VBA Macro Code. Excel VBA Variables. Got any Excel Questions? See Also: Lifetime and Scope of. Variables. VARIABLESA Variable is used to store temporary information that is used for execution. Procedure, Module or Workbook. A Variable name must Start with a letter and not a number. A Variable name can be no longer than 2. All Variables must consist of one continuous string of characters only. For Example you could name. An example of this could be the system I use! If you were to. declare a variable as a Boolean (shown in table below) I may use: b. Is. Open. I might then use this Boolean variable to check if a Workbook is open or not. You may see code that uses letters only as variables. Trying to read code that has loads of single letters. Variables can be declared as any one of the following data. Byte data type. A data type used to hold positive integer numbers ranging from 0 to 2. Byte. variables are stored as single, unsigned 8- bit (1- byte) numbers. Boolean data type. A data type with only two possible values, True (- 1) or False (0). Boolean. variables are stored as 1. Integer data type. A data type that holds integer variables stored as 2- byte whole numbers in the. The Integer data type is also used to represent. The percent sign (%) type- declaration character represents an. Integer in Visual Basic. Long data type. A 4- byte integer ranging in value from - 2,1. The. ampersand (& ) type- declaration character represents a Long in Visual Basic. Currency data type. A data type with a range of - 9. Use this data type for calculations involving money. The. at sign (@) type- declaration character represents Currency in Visual Basic. Single data type A data type that stores single- precision floating- point variables as 3. E3. 8 to. - 1. 4. E- 4. 5 for negative values, and 1. E- 4. 5 to 3. 4. 02. E3. 8 for positive. The exclamation point (!) type- declaration character represents a Single. Visual Basic. Double data type A data type that holds double- precision floating- point numbers as 6. E3. 08 to - 4. 9. E- 3. 24 for. negative values; 4. E- 3. 24 to 1. 7. E3. 08 for positive. The number sign (#) type- declaration character represents the Double in. Visual Basic. Date data type. A data type used to store dates and times as a real number. Date variables are. The value to the left of the decimal. String data type. A data type consisting of a sequence of contiguous characters that represent the. A String can include. The String data type can store. K characters. and dynamic strings ranging in length from 0 to approximately 2 billion. The dollar sign ($) type- declaration character represents a String. Visual Basic. Object data type A data type that represents any Object reference. Object variables are stored as. Variant data type Variant data type A special. Empty and Null. The Variant data type has a numeric storage size of 1. Decimal, or a character storage. The Var. Type function defines how the data in a Variant is treated. All variables. become Variant data types if not explicitly declared as some other data type. Why we use variables. Excel will still allow us to run. But having said this it is. You could quite easily just assign a. Your code would become hard to follow (even for yourself). Excel would constantly need to look for the value elsewhere. Editing your code would become awkward. It would also mean if we had many other. B2, it would need to retrieve it's. There is a lot of editing to be done if we were to change from wanting. B5 value. Let's now use a variable to store the value of cell. B2! Sub With. Variable(). Dim i. My. Value as Integer. My. Value = Range(. To edit our code we only need to change it in one place. You might be thinking that there is no big difference in the above 2 examples. But what you must realize is, most VBA. They. would also contain a lot more than one procedure. If you had 2 average size VBA. Declaring Variables. To declare a variable we use the word . So a. variable dimmed as a String could look like: Dim s. My. Word As String. You will notice that as soon as we type the word As, Excel will display a. The default value for any Numeric type Variable is zero. To assign a value to a Numeric or String type Variable, you simply use your. Variable name, followed by the equals sign (=) and then the String or Numeric. Not Declaring Variables. There is a difference between using. You can if you wish not declare a. Value or Object. Unfortunately this comes. If you are using variables which have not been dimensioned. Excel (by default) will store them as the Variant data type. This means that. Excel will need to decide each time it (the variable) is assigned a value what. The price for this is slower running of code! My advise. is do it right and form the good habit early! There is also another advantage to correctly declaring variables and that is. Excel will constantly check to ensure you have spelt the variable name. It does this by capitalizing the all lower case letters that are. Let's assume you you use: Dim i. My. Number As Integer. At the top of your procedure. You. then intend to use this variable in other parts of the procedure. Each time you. type imynumber and then push the Space bar or Enter Excel will capitalize. My. Number. This is a very. While we are on this subject, it is very good practice to type all code in lower. Excel do this for variables but also for all. Keywords! There may be times when you will actually need to use a Variant data type as you. It might be text. In these circumstances you can use: Dim v. Un. Known As Variant Or, simply: Dim v. Un. Known. Both are quite valid! The reason we. do not have to explicitly declare a Variant is because the default for a. Variant. See Also: Lifetime and Scope of. Dashboard Reports & Excel Dashboard Charts 5. Off. Become an Excel. User Affiliate & Earn Money! Free. Complete Excel Training Course. OR Excel Add- ins Collection. ALL. purchases totaling. BOTH! Purchases MUST be made via. Send payment proof to . Instant Download and Money Back Guarantee on Most Software. Excel Trader Package. Technical Analysis in Excel With $1. FREE software! Microsoft . Oz. Grid is in no way associated with Microsoft. Some of our more popular products are below.. Convert Excel Spreadsheets To Webpages .
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