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From: NoEmailAds AT execpc DOT com (Chris Giese)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Copying clipboard into string
Date: Sat, 14 Mar 2009 23:14:24 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Eli Zaretskii <eliz AT gnu DOT org> wrote:

>> From: "Jason" <nospam AT net>
>> Date: Fri, 13 Mar 2009 22:51:10 +0100
>> 
>> it possible with Djgpp copying the contents of  Windows
>> clipboard into a string.
>
>Yes, assuming you are on Windows 9X/Me.  On W2K and later, no (AFAIK).
>
>> What commands should  use?
>
>If you mean programmatically, then you will need to write code that
>accesses the Windows clipboard through Int 2Fh/AH=17h.
>
>> Do you have examples of code?


#include <sys/movedata.h>
#include <stdlib.h>
#include <stdio.h>
#include <dpmi.h>
static int rm_int_es_bx(void *buf, unsigned buf_size,
		__dpmi_regs *regs, unsigned int_num) {
	int seg, sel;

/* allocate conventional memory */
	seg = __dpmi_allocate_dos_memory((buf_size + 15) / 16, &sel);
	if(seg == -1) {
		printf("Error: can't allocate conventional memory\n");
		return -1;
	}
/* copy buffer to conventional memory */
	dosmemput(buf, buf_size, seg * 16);
/* point real-mode ES and BX to buffer and do interrupt */
	regs->x.es = seg;
	regs->x.bx = 0;
	__dpmi_int(int_num, regs);
/* copy conventional memory back to buffer and free conventional memory */
	dosmemget(seg * 16, buf_size, buf);
	__dpmi_free_dos_memory(sel);
	return 0;
}

int main(void) {
	static const char to[] = "Hello";
	unsigned long len;
	__dpmi_regs regs;
	char *from;

/* identify WINOLDAP version */
	regs.x.ax = 0x1700;
	__dpmi_int(0x2F, &regs);
	if(regs.x.ax == 0x1700) {
		printf("Can't access Windows clipboard\n");
		return 1;
	}
/* open clipboard (ignore return value) */
	regs.x.ax = 0x1701;
	__dpmi_int(0x2F, &regs);
/* check if any text already in clipboard */
	regs.x.ax = 0x1704;
	regs.x.dx = 0x01;
	__dpmi_int(0x2F, &regs);
	len = regs.x.dx * 0x10000L + regs.x.ax;
	if(len == 0)
		printf("No text in Windows clipboard\n");
	else {
		from = malloc(len);
		if(from == NULL)
			printf("Not enough memory to read Windows clipboard\n");
		else {
			regs.x.ax = 0x1705;
			regs.x.dx = 0x01;
			rm_int_es_bx(from, len, &regs, 0x2F);
			if(regs.x.ax == 0)
				printf("Error reading Windows clipboard\n");
			else
				printf("Text in Windows clipboard is:\n%s\n",
					from);
			free(from);
		}
	}
/* set clipboard data */
	printf("Writing to Windows clipboard...\n");
	regs.x.ax = 0x1703;
/* 1=text, 2=bitmap, 3=.WMF...see Ralf Brown's list for more: */
	regs.x.dx = 0x01;
	regs.x.si = 0;
	regs.x.cx = sizeof(to);
	rm_int_es_bx(to, sizeof(to), &regs, 0x2F);
	if(regs.x.ax == 0)
		printf("Error writing Windows clipboard\n");
/* close clipboard */
	regs.x.ax = 0x1708;
	__dpmi_int(0x2F, &regs);
	return 0;
}