VC书籍

开发平台：

C++ Builder

Unit1.cpp：源码内容

							//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
  TDeviceMode dv;
  bool bl;
  old_scr_width=Screen->Width;
  old_scr_height=Screen->Height;
  bl=EnumDisplaySettings(NULL,0,&dv);
  if(bl)
  {
    dv.dmFields=DM_PELSWIDTH | DM_PELSHEIGHT;
    dv.dmPelsWidth=1024;
    dv.dmPelsHeight=768;
    if(ChangeDisplaySettings(&dv,0)==DISP_CHANGE_SUCCESSFUL)
      ShowMessage("屏幕分辩率已改为1024*768n但该程序关闭后会恢复到原状");
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormDestroy(TObject *Sender)
{
  TDeviceMode dv;
  bool bl;
  bl=EnumDisplaySettings(NULL,0,&dv);
  if(bl)
  {
    dv.dmFields=DM_PELSWIDTH | DM_PELSHEIGHT;
    dv.dmPelsWidth=old_scr_width;
    dv.dmPelsHeight=old_scr_height;
    if(ChangeDisplaySettings(&dv,0)==DISP_CHANGE_SUCCESSFUL)
      ShowMessage("屏幕恢复到原状");
  }
}
//---------------------------------------------------------------------------

						