To update a SolidWorks model using data from an Excel file via VBA, you'll need to automate SolidWorks from Excel or vice versa. Here’s a step-by-step guide for creating a VBA script that accomplishes this:



### **1. Set Up Your Excel File**
- **Prepare the Excel File:** Ensure your Excel sheet contains the parameters you want to update in the SolidWorks model. For example, column A could contain parameter names, and column B could contain their corresponding values.

### **2. Open the SolidWorks VBA Editor**
- **Access VBA Editor:** In SolidWorks, press `Alt + F11` to open the VBA editor.
- **Insert a Module:** Go to `Insert > Module` to add a new module where you'll write your VBA code.

### **3. Write the VBA Code to Update the Model**

Here’s a basic example of how you might structure your code:

```vba
Sub UpdateModelFromExcel()
    ' Declare variables
    Dim swApp As SldWorks.SldWorks
    Dim swModel As SldWorks.ModelDoc2
    Dim swPart As SldWorks.PartDoc
    Dim swParam As SldWorks.Parameter
    Dim paramName As String
    Dim paramValue As Double
    Dim excelApp As Object
    Dim excelWorkbook As Object
    Dim excelSheet As Object
    Dim lastRow As Long
    Dim i As Integer

    ' Create SolidWorks and Excel Application objects
    Set swApp = Application.SldWorks
    Set excelApp = CreateObject("Excel.Application")

    ' Open the Excel file
    Set excelWorkbook = excelApp.Workbooks.Open("C:pathtoyourexcelfile.xlsx")
    Set excelSheet = excelWorkbook.Sheets(1)

    ' Get the active model in SolidWorks
    Set swModel = swApp.ActiveDoc

    ' Get the last row of data in Excel
    lastRow = excelSheet.Cells(excelSheet.Rows.Count, 1).End(xlUp).Row

    ' Loop through the Excel data and update the SolidWorks model
    For i = 2 To lastRow
        paramName = excelSheet.Cells(i, 1).Value
        paramValue = excelSheet.Cells(i, 2).Value

        ' Get the parameter in SolidWorks
        Set swParam = swModel.Parameter(paramName)

        ' Update the parameter value
        If Not swParam Is Nothing Then
            swParam.SystemValue = paramValue
        Else
            MsgBox "Parameter " & paramName & " not found in the model."
        End If
    Next i

    ' Rebuild the model to apply changes
    swModel.EditRebuild3

    ' Close the Excel workbook
    excelWorkbook.Close False
    excelApp.Quit

    ' Release Excel object from memory
    Set excelSheet = Nothing
    Set excelWorkbook = Nothing
    Set excelApp = Nothing

    MsgBox "Model updated successfully with Excel data!"
End Sub
```

### **4. How the Code Works:**

- **Declare Variables:** The script begins by declaring variables for SolidWorks and Excel applications, as well as for the parameters to be updated.
- **Create Objects:** It then creates instances of the SolidWorks and Excel applications.
- **Open the Excel File:** The script opens the specified Excel file and accesses the first worksheet.
- **Update Parameters:** It loops through each row in the Excel sheet, retrieves the parameter names and values, and updates the corresponding parameters in the SolidWorks model.
- **Rebuild the Model:** After updating the parameters, the model is rebuilt to reflect the changes.
- **Close Excel:** Finally, it closes the Excel workbook and releases the Excel objects from memory.

### **5. Running the Macro**
- **Run the Macro:** You can run the macro from within SolidWorks by navigating to `Tools > Macro > Run`, selecting the script, and executing it.

### **6. Notes:**
- Ensure that the parameter names in Excel match exactly with those in the SolidWorks model.
- The file paths and parameter types need to be adjusted according to your specific use case.
- Make sure to have SolidWorks open with the model loaded before running the script.

This script is a basic example, and you can customize it further to fit your specific needs, such as handling different types of parameters, adding error handling, or automating the process entirely from Excel.