how to set flag after sent message to mobile numbers

#include<reg51.h>
#include<stdio.h>
bit moreover,data_bit,sucess,pin,bok,bok1,gprs,gprs9,uma1,flag;
char dat1;
sbit f3locking=P2^7;
sbit f3locking1=P3^4;
sbit WaitFor = P1^4;
unsigned char dataword[48],APN[12],content[22];
unsigned char addresstemp;
unsigned char Pagetemp;

int Page,Number,Number2;
char status;
sfr T2CON=0xc8;
sfr RCAP2H=0xcb;
sfr RCAP2L=0xca;



void hari();
void LoadMessage();
void incrementD();
void GetData11();
void MessageToMob();
void tx0(unsigned char x)
;
#define attempts 3

#include "EepromDriver.c"
#include "RxDTxD.c"
#include "Initialization.c"
#include "summary.c"
#include "gprsdata.c"


main()
{
StartingDelay();
pin=ramdata;
moreover=0;
SCON=0x53;
T2CON=0x34;
RCAP2H=0xff; //ffec
RCAP2L=0xD9;


// RCAP2H=0xff; //ffec
// RCAP2L=0xB2;
moreover=0;

for(Number=1;Number<=32;Number++){WriteDataTo1024(206,Number,0x20); }
ReadDataFrom1024(205,10);
Number2=dat1;
if(Number2>=250 ||Number2<=219){Number2=220;WriteDataTo1024(205,10,220);}
Initiate();
gprs=0;
status=1;
moreover=0;
status=1;
WriteDataTo1024(202,2,0x01);
WriteDataTo1024(202,1,0x01);
WriteDataTo1024(206,1,'0');
WriteDataTo1024(205,1,1);
//ReadDataFrom1024(202,0xab);if(dat1=='1'){Initialise();}


WriteDataTo1024(206,50,'1');
while(1)
{
if(f3locking==0)
{
ModemStatus();
SimInserted();
CheckSignal();
SystemTemp();

incrementD();
moreover=0;
ReadDataFrom1024(245,90);
if(flag==0){
if(dat1=='/'){MessageToMob();}
tx0(0x1A);
flag=1;
}

bok=0;bok1=0;
moreover=0;
ReadDataFrom1024(202,0xab);
if(dat1=='1'){GPRSSend();}

moreover=0;
ReadDataFrom1024(202,0xae);
if(dat1=='1'){SendPC();}

moreover=0;
ReadDataFrom1024(202,0xa1);
if(dat1=='1'){SendGSM();}

moreover=0;
ReadDataFrom1024(202,0xa6);
if(dat1=='1'){LoadMessage();}
StartingDelay();
}
}
}

void tx0(unsigned char x) //send data to serial port 0
{
EA=0;
SBUF=x;
while(TI==0);
TI=0;
EA=1;
}

void LoadMessage()
{
SendReport();
}

void incrementD()
{
moreover=0;
for(Page=1;Page<=100;Page++)
{
Number=1;
ReadDataFrom1024(Page,Number);
if(dat1=='/'){goto outincd;}
Number=125;
ReadDataFrom1024(Page,125);
if(dat1=='/'){goto outincd;}
}
Page=1;Number=1;
WriteDataTo1024(202,221,0x20);
outincd:
moreover=0;
WriteDataTo1024(202,2,Number);
WriteDataTo1024(202,1,Page);
WriteDataTo1024(202,221,'1');
}


void MessageToMob()
{
int i;
char j=2;
ReadDataFrom1024(245,1);
if(dat1!=0x20)
{
printf("AT+CMGS=");putchar('"');printf("+91");
do{gprs=0;}while(f3locking==1);
do{
ReadDataFrom1024(245,j);
if(j>0x0f){goto mout1;}
if(dat1!='*'){putchar(dat1);}
j++;
}while(dat1!='*');
mout1:;
putchar('"');
Enter();
do{
while(RI==0){}
ACC=SBUF;
RI=0;
dat1=ACC; if(dat1=='E'){goto mout2;}
}while(dat1!='>');
GetData11();
Enter();
SendStringOnGSM("WName:");
i=0x90;
do{
ReadDataFrom1024(202,i);
if(dat1!='*'){SendCharOnGSM(dat1);}
i++;
if(i>=0x9b){dat1='*';}
}while(dat1!='*');
Enter();
SendCharOnGSM(0x1a);
WriteDataTo1024(245,1,0x20);
WriteDataTo1024(245,125,0x20);
mout2:;
}
}

void GetData11()
{
int j;
char h=1;
j=90+1;
if(f3locking==0)
{
moreover=0;
selection(h);h++;
do{
ReadDataFrom1024(245,j);

if(dat1=='/')
{
goto cdm;
}
if(dat1!='|')
{SendCharOnGSM(dat1);}
else{SendCharOnGSM(0x0a);SendCharOnGSM(0x0d);selection(h);h++;
}
j++;
}while(dat1!='/');
cdm:; }
}

@Ramweit
What is it you want to know ?

From this code gsm modem sending SMS to mobiles multiple times to avoid that am trying to give flag for sent SMS, if flag value is 1 have to stop sending SMS repeatedly.....

After the SMS is sent the modem should respond
+CMGS: xx
OK

Just wait a few seconds for the reply.
If you get "OK" stop sending.

Of course is the message was not sent the first time
it probably will not be sent at all.


Which modem are you using ?

Thank you for response,

Sim300 gsm Modem am using here...