用C++检查VBA代码的数字签名是否有效

Aspose.Cells允许你使用Workbook.VbaProject.IsValidSigned属性检查VBA代码数字签名是否有效。如果验证通过，返回true；否则返回false。当你修改VBA代码后，数字签名会失效。

用C++检查VBA代码的数字签名是否有效

以下代码演示了如何使用示例Excel文件测试此属性。该Excel文件有有效签名，但修改其VBA代码后，保存并重新检测时，签名变得无效。

#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;

int main()
{
    Aspose::Cells::Startup();

    // Source directory path
    U16String srcDir(u"..\\Data\\01_SourceDirectory\\");

    // Load the workbook from an existing Excel file with VBA project
    Workbook workbook(srcDir + u"sampleVBAProjectSigned.xlsm");

    // Check if the VBA Code Project is valid signed
    std::cout << "Is VBA Code Project Valid Signed: " << (workbook.GetVbaProject().IsValidSigned() ? "True" : "False") << std::endl;

    // Modify the VBA Code
    U16String code = workbook.GetVbaProject().GetModules().Get(1).GetCodes();
    code = u"Welcome to Aspose.Cells"; // Directly setting new code here
    workbook.GetVbaProject().GetModules().Get(1).SetCodes(code);

    // Save the workbook
    workbook.Save(srcDir + u"output_out.xlsm");

    // Reload the workbook
    workbook = Workbook(srcDir + u"output_out.xlsm");

    // Now the signature is invalid
    std::cout << "Is VBA Code Project Valid Signed: " << (workbook.GetVbaProject().IsValidSigned() ? "True" : "False") << std::endl;

    Aspose::Cells::Cleanup();
}