| 发表于：2007-06-20 11:28:374楼 得分:0 |
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 type rgbquad
rgbblue as byte
rgbgreen as byte
rgbred as byte
rgbreserved as byte
end type
public type bitmapinfo
bmiheader as bitmapinfoheader
bmicolors as rgbquad
end type
declare function getdc lib "user32 " （byval hwnd as long) as long
declare function createcompatibledc lib "gdi32 " （byval hdc as long) as long
declare function createdibsection lib "gdi32 " （byval hdc as long, pbitmapinfo as bitmapinfo, byval un as long, lplpvoid as long, byval handle as long, byval dw as long) as long
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
declare function selectobject lib "gdi32 " （byval hdc as long, byval hobject as long) as long
declare function deletedc lib "gdi32 " （byval hdc as long) as long
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 ' color table in rgbs
public const srccopy = &hcc0020 ' （dword) dest = source
'----------------------------
'作者:money
'e-mail:2258773@163.com
'涵数功能:拷屏,保存为bmp文件
'成功返回真
'----------------------------
public function copyscreentobmp（byval szfile as string) as boolean
dim w as long, h as long
dim scrdc as long
dim dib as long, m_dc as long
dim bmpinfo as bitmapinfo
dim bmpfilehead as bitmapfileheader
dim pdata as long
dim buff（) as byte
dim old as long
dim l as long
'取屏幕 高宽
w = screen.width \ 15
h = screen.height \ 15
'准备内存dc
m_dc = createcompatibledc（0&)
if m_dc = 0 then
copyscreentobmp = false
exit function
end if
'填充dib的bmp结构
with bmpinfo.bmiheader
.bibitcount = 24
.biplanes = 1
.biheight = h
.biwidth = w
.bisize = 40 '本结构长度
end with
dib = createdibsection（m_dc, bmpinfo, dib_rgb_colors, pdata, 0, 0)
'分配内存
if dib = 0 then
copyscreentobmp = false
exit function
end if
old = selectobject（m_dc, dib)
'拷屏
scrdc = getdc（0)
bitblt m_dc, 0, 0, w, h, scrdc, 0, 0, srccopy
'分配内存
l = w * h * 3
'补足4的倍数
if l mod 4 <> 0 then l = l + （4 - l mod 4)
redim buff（1 to l) as byte
'取像素数据
copymemory varptr（buff（1)), pdata, l
'释放资源
selectobject m_dc, old
deleteobject dib
deletedc m_dc
'填充bmpfile
with bmpfilehead
'bm标志
.bftype（0) = asc（ "b "): .bftype（1) = asc（ "m ")
.bfsize = len（bmpfilehead) + len（bmpinfo) + l
.bfoffbits = len（bmpfilehead) + len（bmpinfo)
end with
'写入文件
l = freefile（)
open szfile for binary as l
'写入文件头
put l, 1, bmpfilehead
put l, , bmpinfo
'写入实际像素
put l, , buff（)
close l
copyscreentobmp = true
end function
'__________________________________________ forms
option explicit
private sub command1_click（)
dim ok as boolean
ok = copyscreentobmp（ "c:\test.bmp ")
if ok then
me.picture = loadpicture（ "c:\test.bmp ")
else
msgbox "cao,拷屏失败了~ "
end if
end sub
'------------------------
private sub form_load（)
end sub
| | |
|
