Hi Wolgang, Your question is not clear to me. If you execute the short example below, you should be able to play with the object c1; //program walt.cxx #include "TRint.h" #include "TCanvas.h" #include "TLine.h" int main(int argc, char **argv) { TRint theApp("Rint", &argc, argv); TCanvas *c1 = new TCanvas(); TLine *l = new TLine(.1,.2,.8,.7); l->Draw(); theApp.Run(); return 0; } g++ -o walt walt.cxx `root-config --cflags --glibs` walt root [0] c1.ls() Canvas Name=c1 Title=c1 Option= TCanvas fXlowNDC=0 fYlowNDC=0 fWNDC=1 fHNDC=1 Name= c1 Title= c1 Option= TLine X1=0.100000 Y1=0.200000 X2=0.800000 Y2=0.700000 Rene Brun On Mon, 26 Aug 2002, Wolfgang Waltenberger wrote: > Dear Roottalk, > > consider the following code in an application: > > TRint r("Test", NULL, NULL ); > TCanvas *c1 = new TCanvas(); > r.Run(); > > How can I "pull" my TCanvas object "into" the runtime environment? All > my efforts did not work; TRint seems to "see" an object called c1, but > it's always a null pointer - no matter if TCanvas is used with "static" > or "new" or anything . Although, it is a pointer pointing to a TCanvas > object, mind you. So is there a simple way to preserve objects. I want > instantiation to occur in the mother application, then mess around with > them in the TRint "daughter", like a very fancy debugger ... > Is there a way? > > Ciao, Wolfgang. >
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