毕业设计——使用vb访问BMP位图，如何读取位图分辨率？

Private Declare Function GetObject Lib "gdi32" Alias "GetObjectA" _

(ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) _

As Long

Private Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, _

ByVal dwCount As Long, lpBits As Any) As Long

Private Type BITMAP

bmType As Long

bmWidth As Long

bmHeight As Long

bmWidthBytes As Long

bmPlanes As Integer

bmBitsPixel As Integer

bmBits As Long

End Type

Private Sub Command1_Click()

Dim hBitmap As Long

Dim res As Long

Dim bmp As BITMAP

Dim byteAry() As Byte

Dim totbyte As Long, i As Long

hBitmap = Picture1.Picture.Handle

res = GetObject(hBitmap, Len(bmp), bmp) '取得BITMAP的结构

totbyte = bmp.bmWidthBytes * bmp.bmHeight '总共要多少BYTE来存图

ReDim byteAry(totbyte - 1)

'将Picture1中的图信息存到ByteAry

res = GetBitmapBits(hBitmap, totbyte, byteAry(0))

Debug.Print "Total Bytes Copied :"; res

Debug.Print "bmp.bmBits "; bmp.bmBits

Debug.Print "bmp.bmBitsPixel "; bmp.bmBitsPixel '每相素位数

Debug.Print "bmp.bmHeight "; bmp.bmHeight '以相素计算图象高度

Debug.Print "bmp.bmPlanes "; bmp.bmPlanes

Debug.Print "bmp.bmType "; bmp.bmType

Debug.Print "bmp.bmWidth "; bmp.bmWidth '以相素计算图形宽度

Debug.Print "bmp.bmWidthBytes "; bmp.bmWidthBytes '以字节计算的每扫描线长度