Windows API: Change or detect screen resolution (2) 2003-01-26 -- Arnor Baldvinsson Newsgroups: comp.lang.clarion
Hi Chris,
On Sun, 26 Jan 2003 05:28:24 GMT, arnor@icetips.com (Arnor
Baldvinsson) wrote:
>some Delphi code from:
And some VB code from:
http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarvbtips/html/msdn_msdn204.asp
Using www.google.com searching for "changing screen resolution in
code" without quotation marks, results in about 238,000 results and
the first page of results looks pretty good to me:)
The VB code is very easy to follow and converts easily to Clarion.
Const CCDEVICENAME = 32
etc.
would become:
CCDEVICENAME EQUATE(32)
CCFORMNAME EQUATE(32)
DM_PELSWIDTH EQUATE(80000h)
DM_PELSHEIGHT EQUATE(100000h)
Private Type DEVMODE
dmDeviceName As String * CCDEVICENAME
dmSpecVersion As Integer
dmDriverVersion As Integer
...
would become:
DEVMODE GROUP,Type
dmDeviceName CString(CCDEVICENAME) ! Or Byte,Dim(CCDEVICENAME)
dmSpecVersion Word
dmDriverVersion Word
...
Private Sub Command1_Click()
Dim a As Boolean
Dim i&
i = 0
Do
a = EnumDisplaySettings(0&, i&, DevM)
i = i + 1
Loop Until (a = False)
End Sub
would become something like this:
DevM DEVMODE
i DWORD
a BOOLEAN
S CString(1)
b Long
Code
i = 0
Loop Until (a = False)
a = EnumDisplaySettings(S, i, DevM)
i =+ 1
End
And this:
Private Sub Command2_Click()
Dim b&
DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
DevM.dmPelsWidth = 800
DevM.dmPelsHeight = 600
b = ChangeDisplaySettings(DevM, 0)
End Sub
would be added to the above Clarion code like this:
DevM.dmFields = BOR(DM_PELSWIDTH,DM_PELSHEIGHT) ! I Think...
DevM.dmPelsWidth = 800
DevM.dmPelsHeight = 600
b = ChangeDisplaySettings(DevM, 0)
I think the prototypes for the functions are in the API viewer thingy
that comes with Clarion.
Best regards,
Arnór Baldvinsson
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