c# - How to unfreeze outlook2007 inspector when is invoked from other app via interop -

i'm trying make app previews mails in outlook 2007. thing when try capture inspector email, graphics aren't yet loaded , need add delay capture function. use thread.sleep. problem though inspector outlook process freezes well. i'm sure of because when use thread.sleep(15000) in app , try manually interact inspector (move, select text, resize), it's frozen. after i'm done in app (just after capture process took place) can access it. here code:

private static void handleoutlookmail(string entryidcollection) {      // incoming mailitem based on id.     namespace outlookns = outlookapp.getnamespace("mapi");     mapifolder mfolder =         outlookapp.session.getdefaultfolder(oldefaultfolders.olfolderinbox);     newmail = (mailitem)         outlookns.getitemfromid(entryidcollection, mfolder.storeid);     // show mail.      = newmail.getinspector;     //make inspector big enough show entire email     i.height=2000;     //activate inspector in order avoid black screen capture     ((_inspector)i).activate();     // dispatch event screen capture take place     onnewoutlookmail(); } 

now when event fired above following handler called:

private void takescreen() {      intptr hwnd = new intptr();     process[] processes = process.getprocessesbyname("outlook");     foreach (process p in processes)     {         if (p.mainwindowtitle == ioutlook.newmail.getinspector.caption)         {             hwnd = p.mainwindowhandle;             debug.writeline("found " + p.mainwindowtitle);             break;         }     }     ioutlook.releaseinspector();     //give time inspector finish loading - useless since freezes , doesn't update     thread.sleep(15000);     //save image disk     system.drawing.image img = (system.drawing.image)capturewindow(hwnd);     img.save("t.png", imageformat.png);     //because added releaseinspector call try unfreeze inspector can't use:     //ioutlook.i.close(microsoft.office.interop.outlook.olinspectorclose.oldiscard); } 

the code 2 functions used above is:

public static void releaseinspector() {     marshal.releasecomobject(i);     marshal.releasecomobject(newmail);     = null;     newmail = null;     gc.collect();     gc.waitforpendingfinalizers();     debug.writeline("released?"); } 

and

public system.drawing.bitmap capturewindow(intptr hwnd) {     system.drawing.rectangle rctform = system.drawing.rectangle.empty;      using (system.drawing.graphics grfx = system.drawing.graphics.fromhdc(getwindowdc(hwnd)))     {         rctform = system.drawing.rectangle.round(grfx.visibleclipbounds);     }      system.drawing.bitmap pimage = new system.drawing.bitmap(rctform.width, rctform.height);     system.drawing.graphics graphics = system.drawing.graphics.fromimage(pimage);      intptr hdc = graphics.gethdc();     //paint control onto graphics using provided options             try     {         printwindow(hwnd, hdc, (uint)0);     }         {         graphics.releasehdc(hdc);     }     return pimage; } 

any ideas? appreciated. in advance.

ok, got answer msdn forums. thing outlook waits (synchronously) handler return. key start thread in handler run takescreen , put thread.sleep there. way handler return before screenshot made , inspector have time update/ load graphics.