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ChatGPT的回答:
- 要实现这个功能,我们需要使用VBA与Windows API来实现将Base64编码的图片转换为用户可以通过粘贴操作插入到目标应用中的图片。以下是实现此功能的步骤:
- 转换Base64为图像并保存
- 首先,我们需要将Base64编码的字符串转换为图像,并且保存为一个临时文件。对于这个操作,我们可以使用ADODB.Stream和GDI+ API。
- 使用Windows API实现复制粘贴
- 然后,我们将使用Windows API来进行复制到剪贴板的操作。涉及到的API函数包括OpenClipboard, EmptyClipboard, SetClipboardData, 和 CloseClipboard。
- 实现步骤
- 转换Base64字符串为图片文件
- 使用VBA的ADODB.Stream对象解码Base64字符串并保存为图片文件(例如,临时的JPEG文件)。
- 复制图片到剪贴板
- 使用Windows API操作,将图片文件复制到剪贴板上。
- 这是一个大概的例子来说明这些步骤:
- vb
- Option Explicit
- Private Declare PtrSafe Function OpenClipboard Lib "user32" (ByVal hWnd As LongPtr) As Long
- Private Declare PtrSafe Function CloseClipboard Lib "user32" () As Long
- Private Declare PtrSafe Function SetClipboardData Lib "user32" (ByVal uFormat As Long, ByVal hMem As LongPtr) As LongPtr
- Private Declare PtrSafe Function EmptyClipboard Lib "user32" () As Long
- Private Declare PtrSafe Function LoadImage Lib "user32" Alias "LoadImageA" (ByVal hInstance As LongPtr, ByVal lpFileName As String, ByVal uType As Long, ByVal cxDesired As Long, ByVal cyDesired As Long, ByVal fuLoad As Long) As LongPtr
- Private Declare PtrSafe Function GlobalAlloc Lib "kernel32" (ByVal uFlags As Long, ByVal dwBytes As LongPtr) As LongPtr
- Private Declare PtrSafe Function GlobalLock Lib "kernel32" (ByVal hMem As LongPtr) As LongPtr
- Private Declare PtrSafe Function GlobalUnlock Lib "kernel32" (ByVal hMem As LongPtr) As Long
- Private Declare PtrSafe Function lstrcpy Lib "kernel32" (ByVal lpString1 As Any, ByVal lpString2 As Any) As LongPtr
- Private Const CF_BITMAP = 2
- Private Const IMAGE_BITMAP = 0
- Private Const LR_LOADFROMFILE = &H10
- Private Const GMEM_MOVEABLE = &H2
- Sub Base64ToClipboard(Base64String As String)
- Dim bytes() As Byte
- Dim ImagePath As String
- Dim hBitmap As LongPtr
- ' 将Base64字符串转换为字节数组
- bytes = DecodeBase64(Base64String)
-
- ' 将字节数组写入临时文件
- ImagePath = SaveBytesToTempImageFile(bytes)
- ' 使用API加载该图片为位图
- hBitmap = LoadImage(0, ImagePath, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE)
-
- If hBitmap <> 0 Then
- If OpenClipboard(0&) Then
- Call EmptyClipboard()
- ' 复制到剪贴板
- Call SetClipboardData(CF_BITMAP, hBitmap)
- Call CloseClipboard()
- End If
- End If
-
- ' 清理:删除临时文件
- Kill ImagePath
- End Sub
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