LoadImage PNG在excel vba中形成image1.picture控件，黑色背景

我有加载PNG图像到图片控制的代码

Option Explicit Option Private Module Private Type GUID Data1 As Long Data2 As Integer Data3 As Integer Data4(0 To 7) As Byte End Type Private Type PICTDESC Size As Long Type As Long hPic As Long hPal As Long End Type Private Type GdiplusStartupInput GdiplusVersion As Long DebugEventCallback As Long SuppressBackgroundThread As Long SuppressExternalCodecs As Long End Type Private Declare Function GdiplusStartup Lib "GDIPlus" ( _ token As Long, _ inputbuf As GdiplusStartupInput, _ Optional ByVal outputbuf As Long = 0) As Long Private Declare Function GdipCreateBitmapFromFile Lib "GDIPlus" ( _ ByVal FileName As Long, _ bitmap As Long) As Long Private Declare Function GdipCreateHBITMAPFromBitmap Lib "GDIPlus" ( _ ByVal bitmap As Long, _ hbmReturn As Long, _ ByVal background As Long) As Long Private Declare Function GdipDisposeImage Lib "GDIPlus" ( _ ByVal Image As Long) As Long Private Declare Function GdiplusShutdown Lib "GDIPlus" ( _ ByVal token As Long) As Long Private Declare Function OleCreatePictureIndirect Lib "olepro32.dll" ( _ PicDesc As PICTDESC, _ RefIID As GUID, _ ByVal fPictureOwnsHandle As Long, _ IPic As IPicture) As Long Public Function LoadImage(ByVal strFName As String) As IPicture Dim uGdiInput As GdiplusStartupInput Dim hGdiPlus As Long Dim hGdiImage As Long Dim hBitmap As Long uGdiInput.GdiplusVersion = 1 If GdiplusStartup(hGdiPlus, uGdiInput) = 0 Then If GdipCreateBitmapFromFile(StrPtr(strFName), hGdiImage) = 0 Then GdipCreateHBITMAPFromBitmap hGdiImage, hBitmap, 0 Set LoadImage = ConvertToIPicture(hBitmap) GdipDisposeImage hGdiImage End If GdiplusShutdown hGdiPlus End If End Function Public Function ConvertToIPicture(ByVal hPic As Long) As IPicture Dim uPicInfo As PICTDESC Dim IID_IDispatch As GUID Dim IPic As IPicture Const PICTYPE_BITMAP = 1 With IID_IDispatch .Data1 = &H7BF80980 .Data2 = &HBF32 .Data3 = &H101A .Data4(0) = &H8B .Data4(1) = &HBB .Data4(2) = &H0 .Data4(3) = &HAA .Data4(4) = &H0 .Data4(5) = &H30 .Data4(6) = &HC .Data4(7) = &HAB End With With uPicInfo .Size = Len(uPicInfo) .Type = PICTYPE_BITMAP .hPic = hPic .hPal = 0 End With OleCreatePictureIndirect uPicInfo, IID_IDispatch, True, IPic Set ConvertToIPicture = IPic End Function 

但PNG图像加载与黑色背景，而不是透明的？ 如何解决这个问题？

Answer 1

我使用这个函数（注意函数可以在一个单独的模块中）：

 Private Sub UserForm_Activate() With Me.Image1 .BorderStyle = fmBorderStyleNone .PictureSizeMode = fmPictureSizeModeZoom .BackStyle = fmBackStyleTransparent .Picture = LoadImage("C:\images\MinersBag.png") End With end sub Public Function LoadImagePat(ByVal h$) As IPicture 'si LoadImage ne marche pas , ou ne fait pas la transparance correct : 'code by lepelletier Patrick 28/02/2016 Dim Aff As Boolean Dim Pic As Shape With Application Aff = .ScreenUpdating .ScreenUpdating = False End With Set Pic = ActiveSheet.Pictures.Insert(h).ShapeRange(1) With Pic .Copy Set LoadImagePat = PastePicture .Delete End With Set Pic = Nothing If Aff Then Application.ScreenUpdating = True End Function 

PastPicture程序是由斯蒂芬·布伦在这里find（ 直接下载链接 ）。 在链接腐烂的情况下，这里是modPastePicture的副本。 将其全部保存到modPastePicture.bas ，然后将该文件导入到VBA编辑器中。

 Attribute VB_Name = "modPastePicture" '*************************************************************************** '* '* MODULE NAME: Paste Picture '* AUTHOR & DATE: STEPHEN BULLEN, Office Automation Ltd '* 15 November 1998 '* '* CONTACT: [e-mail] '* WEB SITE: http://www.oaltd.co.uk '* '* DESCRIPTION: Creates a standard Picture object from whatever is on the clipboard. '* This object can then be assigned to (for example) and Image control '* on a userform. The PastePicture function takes an optional argument of '* the picture type - xlBitmap or xlPicture. '* '* The code requires a reference to the "OLE Automation" type library '* '* he code in this module has been derived from a number of sources '* discovered on MSDN. '* '* To use it, just copy this module into your project, then you can use: '* Set Image1.Picture = PastePicture(xlPicture) '* to paste a picture of whatever is on the clipboard into a standard image control. '* '* PROCEDURES: '* PastePicture The entry point for the routine '* CreatePicture Private function to convert a bitmap or metafile handle to an OLE reference '* fnOLEError Get the error text for an OLE error code '*************************************************************************** Option Explicit Option Compare Text ''' User-Defined Types for API Calls 'Declare a UDT to store a GUID for the IPicture OLE Interface Private Type GUID Data1 As Long Data2 As Integer Data3 As Integer Data4(0 To 7) As Byte End Type 'Declare a UDT to store the bitmap information Private Type uPicDesc Size As Long Type As Long hPic As Long hPal As Long End Type '''Windows API Function Declarations 'Does the clipboard contain a bitmap/metafile? Private Declare Function IsClipboardFormatAvailable Lib "user32" (ByVal wFormat As Integer) As Long 'Open the clipboard to read Private Declare Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As Long 'Get a pointer to the bitmap/metafile Private Declare Function GetClipboardData Lib "user32" (ByVal wFormat As Integer) As Long 'Close the clipboard Private Declare Function CloseClipboard Lib "user32" () As Long 'Convert the handle into an OLE IPicture interface. Private Declare Function OleCreatePictureIndirect Lib "olepro32.dll" (PicDesc As uPicDesc, RefIID As GUID, ByVal fPictureOwnsHandle As Long, IPic As IPicture) As Long 'Create our own copy of the metafile, so it doesn't get wiped out by subsequent clipboard updates. Declare Function CopyEnhMetaFile Lib "gdi32" Alias "CopyEnhMetaFileA" (ByVal hemfSrc As Long, ByVal lpszFile As String) As Long 'Create our own copy of the bitmap, so it doesn't get wiped out by subsequent clipboard updates. Declare Function CopyImage Lib "user32" (ByVal handle As Long, ByVal un1 As Long, ByVal n1 As Long, ByVal n2 As Long, ByVal un2 As Long) As Long 'The API format types we're interested in Const CF_BITMAP = 2 Const CF_PALETTE = 9 Const CF_ENHMETAFILE = 14 Const IMAGE_BITMAP = 0 Const LR_COPYRETURNORG = &H4 '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ''' Subroutine: PastePicture ''' ''' Purpose: Get a Picture object showing whatever's on the clipboard. ''' ''' Arguments: lXlPicType - The type of picture to create. Can be one of: ''' xlPicture to create a metafile (default) ''' xlBitmap to create a bitmap ''' ''' Date Developer Action ''' -------------------------------------------------------------------------- ''' 30 Oct 98 Stephen Bullen Created ''' 15 Nov 98 Stephen Bullen Updated to create our own copies of the clipboard images ''' Function PastePicture(Optional lXlPicType As Long = xlPicture) As IPicture 'Some pointers Dim h As Long, hPicAvail As Long, hPtr As Long, hPal As Long, lPicType As Long, hCopy As Long 'Convert the type of picture requested from the xl constant to the API constant lPicType = IIf(lXlPicType = xlBitmap, CF_BITMAP, CF_ENHMETAFILE) 'Check if the clipboard contains the required format hPicAvail = IsClipboardFormatAvailable(lPicType) If hPicAvail <> 0 Then 'Get access to the clipboard h = OpenClipboard(0&) If h > 0 Then 'Get a handle to the image data hPtr = GetClipboardData(lPicType) 'Create our own copy of the image on the clipboard, in the appropriate format. If lPicType = CF_BITMAP Then hCopy = CopyImage(hPtr, IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG) Else hCopy = CopyEnhMetaFile(hPtr, vbNullString) End If 'Release the clipboard to other programs h = CloseClipboard 'If we got a handle to the image, convert it into a Picture object and return it If hPtr <> 0 Then Set PastePicture = CreatePicture(hCopy, 0, lPicType) End If End If End Function '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ''' Subroutine: CreatePicture ''' ''' Purpose: Converts a image (and palette) handle into a Picture object. ''' ''' Requires a reference to the "OLE Automation" type library ''' ''' Arguments: None ''' ''' Date Developer Action ''' -------------------------------------------------------------------------- ''' 30 Oct 98 Stephen Bullen Created ''' Private Function CreatePicture(ByVal hPic As Long, ByVal hPal As Long, ByVal lPicType) As IPicture ' IPicture requires a reference to "OLE Automation" Dim r As Long, uPicInfo As uPicDesc, IID_IDispatch As GUID, IPic As IPicture 'OLE Picture types Const PICTYPE_BITMAP = 1 Const PICTYPE_ENHMETAFILE = 4 ' Create the Interface GUID (for the IPicture interface) With IID_IDispatch .Data1 = &H7BF80980 .Data2 = &HBF32 .Data3 = &H101A .Data4(0) = &H8B .Data4(1) = &HBB .Data4(2) = &H0 .Data4(3) = &HAA .Data4(4) = &H0 .Data4(5) = &H30 .Data4(6) = &HC .Data4(7) = &HAB End With ' Fill uPicInfo with necessary parts. With uPicInfo .Size = Len(uPicInfo) ' Length of structure. .Type = IIf(lPicType = CF_BITMAP, PICTYPE_BITMAP, PICTYPE_ENHMETAFILE) ' Type of Picture .hPic = hPic ' Handle to image. .hPal = IIf(lPicType = CF_BITMAP, hPal, 0) ' Handle to palette (if bitmap). End With ' Create the Picture object. r = OleCreatePictureIndirect(uPicInfo, IID_IDispatch, True, IPic) ' If an error occured, show the description If r <> 0 Then Debug.Print "Create Picture: " & fnOLEError(r) ' Return the new Picture object. Set CreatePicture = IPic End Function '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ''' Subroutine: fnOLEError ''' ''' Purpose: Gets the message text for standard OLE errors ''' ''' Arguments: None ''' ''' Date Developer Action ''' -------------------------------------------------------------------------- ''' 30 Oct 98 Stephen Bullen Created ''' Private Function fnOLEError(lErrNum As Long) As String 'OLECreatePictureIndirect return values Const E_ABORT = &H80004004 Const E_ACCESSDENIED = &H80070005 Const E_FAIL = &H80004005 Const E_HANDLE = &H80070006 Const E_INVALIDARG = &H80070057 Const E_NOINTERFACE = &H80004002 Const E_NOTIMPL = &H80004001 Const E_OUTOFMEMORY = &H8007000E Const E_POINTER = &H80004003 Const E_UNEXPECTED = &H8000FFFF Const S_OK = &H0 Select Case lErrNum Case E_ABORT fnOLEError = " Aborted" Case E_ACCESSDENIED fnOLEError = " Access Denied" Case E_FAIL fnOLEError = " General Failure" Case E_HANDLE fnOLEError = " Bad/Missing Handle" Case E_INVALIDARG fnOLEError = " Invalid Argument" Case E_NOINTERFACE fnOLEError = " No Interface" Case E_NOTIMPL fnOLEError = " Not Implemented" Case E_OUTOFMEMORY fnOLEError = " Out of Memory" Case E_POINTER fnOLEError = " Invalid Pointer" Case E_UNEXPECTED fnOLEError = " Unknown Error" Case S_OK fnOLEError = " Success!" End Select End Function 

Answer 2

为什么不使用接受PNG文件的插入/图片？ 你仍然可以给它分配一个macros。

AFAIK只有PNG文件支持透明背景。

如果它是一个用户窗体，我不知道任何你可以添加，支持透明对象。 但是你的背景应该是静态的，所以你可以伪造它。

也许你可以匹配图像背后的颜色？ 您可以从表单属性中获取颜色代码。

如果它是一个静态的背景，但不是一个单一的颜色，你可以采取一个屏幕截图，剪辑你想要的部分作为图像的背景，在照片编辑器中将2个图像叠加在一起，然后输出为bmp，这会将两层平铺为一个。 有免费的照片编辑，可以做到这一点。