1   
2   //---------------------------------------------------------------------------
3   
4   #include <vcl.h>
5   #pragma hdrstop
6   
7   #include "Unit1.h"
8   //---------------------------------------------------------------------------
9   #pragma package(smart_init)
10  #pragma resource "*.dfm"
11  TForm1 *Form1;
12  //---------------------------------------------------------------------------
13  __fastcall TForm1::TForm1(TComponent* Owner)
14          : TForm(Owner)
15  {
16  }
17  //---------------------------------------------------------------------------
18  
19  void __fastcall TForm1::Button1Click(TObject *Sender)
20  {
21  DEVMODE dmScreenSettings;
22  memset(&dmScreenSettings,0,sizeof(dmScreenSettings)); // Clear Memory so empty 
23  fields are zero
24  dmScreenSettings.dmSize=sizeof(dmScreenSettings);  // Size of structure or record 
25  in delphi
26  dmScreenSettings.dmPelsWidth = 1024;    // ScreenWidth
27  dmScreenSettings.dmPelsHeight = 768;    // Selected Height
28  dmScreenSettings.dmBitsPerPel = 32;     // Color Depth
29  dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT; //Used fields
30  
31  if
32  (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
33  {
34  ShowMessage("Unable to change screen resolution");
35   ChangeDisplaySettings(NULL,0);
36  }
37  else {
38  ShowMessage("Success!");
39  
40  }
41  
42  
43  }
44  //---------------------------------------------------------------------------