Dynamic Modification of custom printing paper in C ++ Builder

In C ++ Builder, We dynamically change the custom printing paper-Linux general technology-Linux programming and kernel information. The following is a detailed description. Because only Delphi examples are provided on the Internet and some examples are unavailable when CB is used for compiling, I simply searched the information and wrote it myself, I am afraid that the netizens will encounter this kind of situation when programming, so they will immediately upload it.

Void _ fastcall TForm1: BitBtn1Click (TObject * Sender)
{
Char * ADevice, * ADriver, * APort;
THandle DeviceMode;
PDeviceMode DevMode;
Int length, width;
Length = 1400;
Width = 2410; // set the size of the Custom paper to 0.1mm
ADevice = new char [100];
ADriver = new char [100];
APort = new char [100];
// Obtain the printer
Printer ()-> GetPrinter (ADevice, ADriver, APort, DeviceMode );
// Obtain the PDevMode Structure
DevMode = (_ devicemodeA *) GlobalLock (void *) DeviceMode );
// Set the value that can be modified
DevMode-> dmFields = DevMode-> dmFields | DM_PAPERSIZE;
DevMode-> dmFields = DevMode-> dmFields | DM_PAPERLENGTH;
DevMode-> dmFields = DevMode-> dmFields | DM_PAPERWIDTH;
// Set the value to be modified
DevMode-> dmPaperSize = DMPAPER_USER; // set as custom paper
DevMode-> dmPaperLength = length;
DevMode-> dmPaperWidth = width;

// Test and print
Printer ()-> BeginDoc ();
TextOut (Printer ()-> Handle, 0, 0, "-----------------", 17 );
Printer ()-> NewPage ();
TextOut (Printer ()-> Handle, 0, 0, "++", 18 );
Printer ()-> NewPage ();
Printer ()-> EndDoc ();
}