Hey I want to change the screen resolution on Windows, usingg Borland C++. How can I do it? Thanks!

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Well I'm more of a java programmer, but this made sense;

Code:

Option Explicit Const DM_BITSPERPEL As Long = &H40000 Const DM_PELSWIDTH As Long = &H80000 Const DM_PELSHEIGHT As Long = &H100000 Const CDS_FORCE As Long = &H80000000 Const CCDEVICENAME As Long = 32 Const CCFORMNAME As Long = 32 Private Type DEVMODE     dmDeviceName As String * CCDEVICENAME     dmSpecVersion As Integer     dmDriverVersion As Integer     dmSize As Integer     dmDriverExtra As Integer     dmFields As Long     dmOrientation As Integer     dmPaperSize As Integer     dmPaperLength As Integer     dmPaperWidth As Integer     dmScale As Integer     dmCopies As Integer     dmDefaultSource As Integer     dmPrintQuality As Integer     dmColor As Integer     dmDuplex As Integer     dmYResolution As Integer     dmTTOption As Integer     dmCollate As Integer     dmFormName As String * CCFORMNAME     dmUnusedPadding As Integer     dmBitsPerPel As Long     dmPelsWidth As Long     dmPelsHeight As Long     dmDisplayFlags As Long     dmDisplayFrequency As Long End Type Private Declare Function EnumDisplaySettings Lib "user32" Alias _     "EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, _     ByVal modeIndex As Long, lpDevMode As Any) As Boolean Private Declare Function ChangeDisplaySettings Lib "user32" Alias _     "ChangeDisplaySettingsA" (lpDevMode As Any, ByVal dwflags As Long) As Long ' change the screen resolution mode ' ' returns True if the requested resolution mode is among those ' supported by the display adapter (otherwise it doesn't even ' try to change the screen resolution) Function ChangeScreenResolution(ByVal Width As Long, ByVal Height As Long, _     ByVal NumColors As Long, Optional Frequency As Long) As Boolean     Dim lpDevMode As DEVMODE     Dim index As Long         ' set the DEVMODE flags and structure size     lpDevMode.dmSize = Len(lpDevMode)     lpDevMode.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT Or DM_BITSPERPEL         ' retrieve info on the Nth display mode, exit if no more     Do While EnumDisplaySettings(0, index, lpDevMode) > 0         ' check whether this is the mode we're looking for         If lpDevMode.dmPelsWidth = Width And lpDevMode.dmPelsHeight = Height _             And 2 ^ lpDevMode.dmBitsPerPel = NumColors Then             ' check that the frequency is also the one we're looking for             If Frequency = 0 Or Frequency = lpDevMode.dmDisplayFrequency Then                 ' try changing the resolution                 If ChangeDisplaySettings(lpDevMode, CDS_FORCE) = 0 Then                     ' zero means success                     ChangeScreenResolution = True                     Exit Do                 End If             End If         End If         ' skip to next screen mode         index = index + 1     Loop End Function

this was in one of the example archive things i found. a little smaller than sid's.

Code:

#include <windows> #include <iostream> int main() { int w=1024; int h=768; int d=32; DEVMODE sDevMode; ZeroMemory(&sDevMode, sizeof(DEVMODE)); sDevMode.dmSize = sizeof(DEVMODE); sDevMode.dmPelsWidth = w; sDevMode.dmFields |= DM_PELSWIDTH; sDevMode.dmPelsHeight = h; sDevMode.dmFields |= DM_PELSHEIGHT; sDevMode.dmBitsPerPel = d; sDevMode.dmFields |= DM_BITSPERPEL; LONG rVal = ChangeDisplaySettings(&sDevMode, CDS_UPDATEREGISTRY); switch (rVal) { case DISP_CHANGE_SUCCESSFUL:  //The settings change was successful. break; default: cout << "Error."; break; } return 0; }

this code worked great for me toxic chicken, all i had to do was change "#include <windows>" to "#include <windows>".