[Tutorial] Cara membuat form transparant dgn VB6 [Part2] ~ Tutorial Programming

berikut saya akan menjelaskan bagaimana membuat form menjadi berbentuk / transparant
mungkin karena bosan dengan bentuk form yg selalu kotak ..
nah buat anda yang ingin mencoba nya silahkan mencoba >>

gambar >>

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tambahkan sebuah module di project anda
dan sisipkan code berikut :

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private declare function getwindowlong lib "user32" alias "getwindowlonga" (byval hwnd as long, byval nindex as long) as long
private declare function setwindowlong lib "user32" alias "setwindowlonga" (byval hwnd as long, byval nindex as long, byval dwnewlong as long) as long
private declare function setlayeredwindowattributes lib "user32" (byval hwnd as long, byval crkey as long, byval bdefaut as byte, byval dwflags as long) as long

private const gwl_exstyle    as long = (-20)
private const lwa_colorkey   as long = &h1
private const lwa_defaut             as long = &h2
private const ws_ex_layered  as long = &h80000

'
public function transparency(byval hwnd as long, optional byval col as long = vbblack, _
 optional byval pctransp as byte = 255, optional byval trmode as boolean = true) as boolean
' return : true if there is no error.
' hwnd   : hwnd of the window to make transparent
' col : color to make transparent if trmode=false
' pctransp  : 0 Ã£  255 >> 0 = transparent  -:- 255 = opaque
dim displaystyle as long
  
 voirstyle = getwindowlong(hwnd, gwl_exstyle)
 if displaystyle <> (displaystyle or ws_ex_layered) then
     displaystyle = (displaystyle or ws_ex_layered)
     call setwindowlong(hwnd, gwl_exstyle, displaystyle)
 end if
 transparency = (setlayeredwindowattributes(hwnd, col, pctransp, iif(trmode, lwa_colorkey or lwa_defaut, lwa_colorkey)) <> 0)
     

 if not err.number = 0 then err.clear
end function

public sub activetransparency(m as form, d as boolean, f as boolean, _
     t_transparency as integer, optional color as long)
dim b as boolean
     if d and f then
     'makes color (here the background color of the shape) transparent
     'upon value of t_transparency
         b = transparency(m.hwnd, color, t_transparency, false)
     elseif d then
         'makes form, including all components, transparent
         'upon value of t_transparency
         b = transparency(m.hwnd, 0, t_transparency, true)
     else
         'restores the form opaque.
         b = transparency(m.hwnd, , 255, true)
     end if
end sub

kemudian untuk form nya . tambahkan code berikut :

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private noc as integer
private str1 as string
private str2 as string
private str3 as string
private strmessage as string

 option explicit

 


 const ws_ex_layered = &h80000
 const gwl_exstyle = (-20)
 const lwa_alpha = &h2
'**************************************
' name: make a transparent area (any size) in your form
' description:this function create a transparent area of dirrent shape (such as rectangle, circle)

' by: sapta_agunk
'
'this code is copyrighted and has' limited warranties.please see http://www.nstars.net/
'1, declararion
' this should be in the form's general declaration area. if you declare in a modeule,
' you need to omit the word "private"
private declare function createroundrectrgn lib "gdi32" (byval x1 as long, byval y1 as long, byval x2 as long, byval y2 as long, byval x3 as long, byval y3 as long) as long
private declare function createrectrgn lib "gdi32" (byval x1 as long, byval y1 as long, byval x2 as long, byval y2 as long) as long
private declare function createellipticrgn lib "gdi32" (byval x1 as long, byval y1 as long, byval x2 as long, byval y2 as long) as long
private declare function combinergn lib "gdi32" (byval hdestrgn as long, byval hsrcrgn1 as long, byval hsrcrgn2 as long, byval ncombinemode as long) as long
private declare function setwindowrgn lib "user32" (byval hwnd as long, byval hrgn as long, byval bredraw as long) as long


'2 the function
' this should be in the form's code.
private function fmakeatransparea(areatype as string, pcordinate() as long) as boolean
'name: fmakeatranparea
'author: sapta_agunk
'date: 15-11-2010
'purpose: create a transprarent area in a form so that you can see through
'input: areatype : a string indicate what kind of hole shape it would like to make
' pcordinate : the cordinate area needed for create the shape:
' example: x1, y1, x2, y2 for rectangle
'output: a boolean
const rgn_diff = 4
dim loriginalform as long
dim lthehole as long
dim lnewform as long
dim lfwidth as single
dim lfheight as single
dim lborder_width as single
dim ltitle_height as single
 on error goto trap
 lfwidth = scalex(width, vbtwips, vbpixels)
 lfheight = scaley(height, vbtwips, vbpixels)
 loriginalform = createrectrgn(0, 0, lfwidth, lfheight)

 lborder_width = (lfheight - scalewidth) / 2
 ltitle_height = lfheight - lborder_width - scaleheight
select case areatype

 case "elliptic"

 lthehole = createellipticrgn(pcordinate(1), pcordinate(2), pcordinate(3), pcordinate(4))
 case "rectangle"

 lthehole = createrectrgn(pcordinate(1), pcordinate(2), pcordinate(3), pcordinate(4))

 case "roundrect"

 lthehole = createroundrectrgn(pcordinate(1), pcordinate(2), pcordinate(3), pcordinate(4), pcordinate(5), pcordinate(6))
 case "circle"
 lthehole = createroundrectrgn(pcordinate(1), pcordinate(2), pcordinate(3), pcordinate(4), pcordinate(3), pcordinate(4))

 case else
 msgbox "unknown shape!!"
 exit function
 end select
 lnewform = createrectrgn(0, 0, 0, 0)
 combinergn lnewform, loriginalform, _
 lthehole, rgn_diff

 setwindowrgn hwnd, lnewform, true
 me.refresh
 fmakeatransparea = true
exit function
trap:
 msgbox "error occurred. error # " & err.number & ", " & err.description
end function





 private sub form_load()
 str1 = "transparant form  --  edited by sapta_agunk thx to mbah google .. ^^v                 " 'contoh text yg akan berjalan
 dim i as integer
 'ex: all transparent at ratio 140/255
 'activetransparency me, true, false, 140, me.backcolor
 'ex: form transparent, visible component at ratio 140/255
 'activetransparency me, true, true, 140, me.backcolor
     
 'example display the form transparency degradation
 activetransparency me, true, false, 0
 me.show
 for i = 0 to 255 step 3
     activetransparency me, true, false, i
     me.refresh
 next i
end sub

untuk finishing desain sesuka hati anda
dengan bentuk2 yang menarik

nb : coding hanya membaca semua warna / color yang berhubungan dengan hitam
sehingga , aplikasi nya >> semua yang berwarna hitam akan menjadi transparant <<

lihat gambar :

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