VB抓屏保存为文件实现代码

下面是一个VB抓屏保存为文件的源文件，很不错的，有精力的可以参考一下。
　　保存在标准模块
　　Option Explicit
　　Public Type BITMAPFILEHEADER
　　　　bfType(0 To 1) As Byte
　　　　bfSize As Long
　　　　bfReserved1 As Integer
　　　　bfReserved2 As Integer
　　　　bfOffBits As Long
　　End Type
　　Public Type BITMAPINFOHEADER \'40 bytes
　　　　biSize As Long
　　　　biWidth As Long
　　　　biHeight As Long
　　　　biPlanes As Integer
　　　　biBitCount As Integer
　　　　biCompression As Long
　　　　biSizeImage As Long
　　　　biXPelsPerMeter As Long
　　　　biYPelsPerMeter As Long
　　　　biClrUsed As Long
　　　　biClrImportant As Long
　　End Type
　　Public Declare Function GetDC Lib \"user32\" (ByVal hwnd As Long) As Long
　　Public Declare Function CreateCompatibleDC Lib \"gdi32\" (ByVal hdc As Long) As Long
　　Public Declare Function CreateDIBSection Lib \"gdi32\" (ByVal hdc As Long, pBitmapInfo As BITMAPINFOHEADER, ByVal un As Long, lplpVoid As Long, ByVal handle As Long, ByVal dw As Long) As Long
　　Public Declare Function BitBlt Lib \"gdi32\" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
　　Public Declare Function SelectObject Lib \"gdi32\" (ByVal hdc As Long, ByVal hObject As Long) As Long
　　Public Declare Function DeleteDC Lib \"gdi32\" (ByVal hdc As Long) As Long
　　Public Declare Function ReleaseDC Lib \"user32\" (ByVal hwnd As Long, ByVal hdc As Long) As Long
　　Public Declare Function DeleteObject Lib \"gdi32\" (ByVal hObject As Long) As Long
　　Public Declare Sub CopyMemory Lib \"kernel32\" Alias \"RtlMoveMemory\" (ByVal Destination As Long, ByVal Source As Long, ByVal Length As Long)
　　Public Const DIB_RGB_COLORS = 0
　　Public Const SRCCOPY = &HCC0020
　　\'
　　\'作者:money
　　\'Email:2258773@163.com
　　\'涵数功能:拷屏,保存为BMP文件
　　\'成功返回真
　　\'