Added the function 'Update-FirstObjectProperties'

Added help text in 'Export-Excel'
Added try/catch to 'Install' and 'InstallModule'
Improved code readability in 'Install' and 'InstallModule'

InstallModule.ps1

@@ -1,40 +1,76 @@
-$ModuleName   = "ImportExcel"
-$ModulePath   = "C:\Program Files\WindowsPowerShell\Modules"
-$TargetPath = "$($ModulePath)\$($ModuleName)"
+<# 
+    .SYNOPSIS   
+        Install the module in the PowerShell module folder.
 
-if(!(Test-Path $TargetPath)) { md $TargetPath | out-null}
+    .DESCRIPTION
+        Install the module in the PowerShell module folder by copying all the files.    
+#>
 
-$targetFiles = echo `
-    *.psm1 `
-    *.psd1 `
-    *.dll `
-    New-ConditionalText.ps1 `
-    New-ConditionalFormattingIconSet.ps1 `
-    Export-Excel.ps1 `
-    Export-ExcelSheet.ps1 `
-    New-ExcelChart.ps1 `
-    Invoke-Sum.ps1 `
-    InferData.ps1 `
-    Get-ExcelColumnName.ps1 `
-    Get-XYRange.ps1 `
-    Charting.ps1 `
-    New-PSItem.ps1 `
-    Pivot.ps1 `
-    Get-ExcelSheetInfo.ps1 `
-    Get-ExcelWorkbookInfo.ps1 `
-    New-ConditionalText.ps1 `
-    Get-HtmlTable.ps1 `
-    Import-Html.ps1 `
-    Get-Range.ps1 `
-    TrackingUtils.ps1 `
-    Copy-ExcelWorkSheet.ps1 `
-    Set-CellStyle.ps1 `
-    ConvertFromExcelToSQLInsert.ps1 `
-    ConvertFromExcelData.ps1 `
-    ConvertToExcelXlsx.ps1 `
-    plot.ps1
+[CmdLetBinding()]
+Param (
+    [ValidateNotNullOrEmpty()]
+    [String]$ModuleName = 'ImportExcel',
+    [ValidateScript({Test-Path -Path $_ -Type Container})]
+    [String]$ModulePath = 'C:\Program Files\WindowsPowerShell\Modules'
+)
 
-Get-ChildItem $targetFiles |
-    ForEach-Object {
-        Copy-Item -Verbose -Path $_.FullName -Destination "$($TargetPath)\$($_.name)"
-    }
+Begin {
+    Try {
+        Write-Verbose "$ModuleName module installation started"
+
+        $Files = @(
+            '*.dll',
+            '*.psd1',
+            '*.psm1',
+            'Charting.ps1',
+            'ConvertFromExcelData.ps1',
+            'ConvertFromExcelToSQLInsert.ps1',
+            'ConvertToExcelXlsx.ps1',
+            'Copy-ExcelWorkSheet.ps1',
+            'Export-Excel.ps1',
+            'Export-ExcelSheet.ps1',
+            'Get-ExcelColumnName.ps1',
+            'Get-ExcelSheetInfo.ps1',
+            'Get-ExcelWorkbookInfo.ps1',
+            'Get-HtmlTable.ps1',
+            'Get-Range.ps1',
+            'Get-XYRange.ps1',
+            'Import-Html.ps1',
+            'InferData.ps1',
+            'Invoke-Sum.ps1',
+            'New-ConditionalText.ps1',
+            'New-ConditionalFormattingIconSet.ps1',
+            'New-ExcelChart.ps1',
+            'New-PSItem.ps1',
+            'Pivot.ps1',
+            'Plot.ps1',
+            'Set-CellStyle.ps1',
+            'TrackingUtils.ps1',
+            'Update-FirstObjectProperties.ps1'
+        )
+    }
+    Catch {
+        throw "Failed installing the module '$ModuleName': $_"
+    }
+}
+
+Process {
+    Try {
+        $TargetPath = Join-Path -Path $ModulePath -ChildPath $ModuleName
+
+        if (-not (Test-Path $TargetPath)) {
+            New-Item -Path $TargetPath -ItemType Directory -EA Stop | Out-Null
+            Write-Verbose "$ModuleName created module folder '$TargetPath'"
+        }
+
+        Get-ChildItem $Files | ForEach-Object {
+            Copy-Item -Path $_.FullName -Destination "$($TargetPath)\$($_.Name)"
+            Write-Verbose "$ModuleName installed module file '$($_.Name)'"
+        }
+
+        Write-Verbose "$ModuleName module installation successful"
+    }
+    Catch {
+        throw "Failed installing the module '$ModuleName': $_"
+    }
+}