Client development method, equipment and medium

The invention discloses a client development method, equipment and a medium, which are used for realizing integration of a first sub-window and a second sub-window of a main window of a client application program so as to improve user experience. The method comprises the following steps: creating a main window of a client application program; establishing a first sub-window and a data transmission mechanism between a first sub-module and a second sub-module of the client; wherein the first sub-module is used for displaying content through the first sub-window; the second sub-module is used for displaying content through a second sub-window; the first sub-window is a sub-window of the main window; based on the data transmission mechanism, sending second sub-window position information to the second sub-module through the first sub-module, creating a second sub-window through the second sub-module, and embedding the created second sub-window into the first sub-window based on the second sub-window position info