HI Friends,

I am facing problem with Flip() Interfaces,below is my code,here i have two 
threads one is for to display text and one is to clear by FillRectangle or 
Clear,i am able display text but not clear.

Please help.

calling thread A:

ret    =    
primary->GetSubSurface(primary,&rect,&subsurface);

ret    =    
subsurface->SetFont(subsurface,font);

ret     =     
subsurface->DrawString(subsurface,text,-1,i,20,DSTF_RIGHT);

ret     =     primary->Flip (primary, 
NULL, DSFLIP_WAITFORSYNC);

calling thread B:

ret    =    
primary->SetColor(primary,0x00,0x00,0x00,0xFF);
ret    =    
primary->FillRectangle(primary,0,0,screen_width,screen_height);
ret    =    primary->Flip (primary, 
NULL,DSFLIP_ONSYNC);

Flip not filling the Screen with given color.



Looking forward for your help. 




  
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