C# programmatically form to image -

there 2 forms in program, form a , form b.

there button in form a can take screen shot of form b(without start form b).

however, components of form b created in form_load function.

i use below code take screen shot of form b generate empty form b image without component of its.

bitmap b = new bitmap(1280, 720); formb.manualload(); formb.drawtobitmap(b, new rectangle(0, 0, 1280, 720)); b.save("d:\\test.bmp");  

the manuaload() function in below.

public void manualload() {     formb_load(null, null);     formb_resize(null, null);     invalidate(); } 

how can fix problem?

i think

formb_load(null, null); , formb_resize(null, null);

ints hanler load , resize event's

next code work

bitmap b = new bitmap(1280, 720); var form = new formb(); form.visible = false; form.show(); form.drawtobitmap(b, new rectangle(0, 0, 1280, 720)); form.close(); b.save("d:\\test.bmp");