Pasar parámetros a programas de window

[rarratia]

Amigos:

Tengo la función SellExecute que abre la calculadora de window (calc.exe), quisiera saber si hay alguna forma de ubicar en una posición determinada dicha calculadora y que no se abra en la posición por defecto. ¿Se puede lograr esto?

[Faust]

Claro que si... usa la función SetWindowPos del API de Windows...

Puedes ver un ejemplo en una de las respuestas de un hilo que abrí hace tiempo, aqui.

[rarratia]

Empezado por Faust

Claro que si... usa la función SetWindowPos del API de Windows...

Puedes ver un ejemplo en una de las respuestas de un hilo que abrí hace tiempo, aqui.

¿Para saber la posción que trae la calculadora se usa una función especial????

[Faust]

Otra opción (que no he usado) es SetWindowPlacement para posicionar una ventana y GetWindowPlacement para obtener su posición y su estado...

Ambas funciones utilizan la estructura WINDOWPLACEMENT, encontrarás ayuda de esto en la ayuda de Windows SDK.

The GetWindowPlacement function retrieves the show state and the restored, minimized, and maximized positions of the specified window.

BOOL GetWindowPlacement(

HWND hWnd, // handle of window
WINDOWPLACEMENT *lpwndpl // address of structure for position data
);


Parameters

hWnd

Identifies the window.

lpwndpl

Points to the WINDOWPLACEMENT structure that receives the show state and position information.
Before calling GetWindowPlacement, set the length member of the WINDOWPLACEMENT structure to sizeof(WINDOWPLACEMENT).
GetWindowPlacement fails if lpwndpl->length is not set correctly.



Return Values

If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The flags member of WINDOWPLACEMENT retrieved by this function is always zero. If the window identified by the hWnd parameter is maximized, the showCmd member is SW_SHOWMAXIMIZED. If the window is minimized, showCmd is SW_SHOWMINIMIZED. Otherwise, it is SW_SHOWNORMAL.
The length member of WINDOWPLACEMENT must be set to sizeof(WINDOWPLACEMENT). If this member is not set correctly, the function returns FALSE.

See Also

SetWindowPlacement, WINDOWPLACEMENT

The SetWindowPlacement function sets the show state and the restored, minimized, and maximized positions of the specified window.

BOOL SetWindowPlacement(

HWND hWnd, // handle of window
CONST WINDOWPLACEMENT *lpwndpl // address of structure with position data
);


Parameters

hWnd

Identifies the window.

lpwndpl

Points to a WINDOWPLACEMENT structure that specifies the new show state and window positions.
Before calling SetWindowPlacement, set the length member of the WINDOWPLACEMENT structure to sizeof(WINDOWPLACEMENT).
SetWindowPlacement fails if lpwndpl->length is not set correctly.



Return Values

If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The length member of WINDOWPLACEMENT must be set to sizeof(WINDOWPLACEMENT). If this member is not set correctly, the function returns FALSE.

See Also

GetWindowPlacement, WINDOWPLACEMENT

The WINDOWPLACEMENT structure contains information about the placement of a window on the screen.

typedef struct _WINDOWPLACEMENT { // wndpl
UINT length;
UINT flags;
UINT showCmd;
POINT ptMinPosition;
POINT ptMaxPosition;
RECT rcNormalPosition;
} WINDOWPLACEMENT;


Members

length

Specifies the length, in bytes, of the structure. Before calling the GetWindowPlacement or SetWindowPlacement functions, set this member to sizeof(WINDOWPLACEMENT).

GetWindowPlacement and SetWindowPlacement fail if this member is not set correctly.

flags

Specifies flags that control the position of the minimized window and the method by which the window is restored. This member can be one or both of the following values:



Value Meaning
WPF_RESTORETOMAXIMIZED
Specifies that the restored window will be maximized, regardless of whether it was maximized before it was minimized. This setting is only valid the next time the window is restored. It does not change the default restoration behavior. This flag is only valid when the SW_SHOWMINIMIZED value is specified for the showCmd member.
WPF_SETMINPOSITION
Specifies that the coordinates of the minimized window may be specified. This flag must be specified if the coordinates are set in the ptMinPosition member.


showCmd

Specifies the current show state of the window. This member can be one of the following values:



Value Meaning
SW_HIDE Hides the window and activates another window.
SW_MINIMIZE Minimizes the specified window and activates the top-level window in the system's list.
SW_RESTORE Activates and displays a window. If the window is minimized or maximized, Windows restores it to its original size and position (same as SW_SHOWNORMAL).
SW_SHOW Activates a window and displays it in its current size and position.
SW_SHOWMAXIMIZED Activates a window and displays it as a maximized window.
SW_SHOWMINIMIZED Activates a window and displays it as an icon.
SW_SHOWMINNOACTIVE Displays a window as an icon. The active window remains active.
SW_SHOWNA Displays a window in its current state. The active window remains active.
SW_SHOWNOACTIVATE Displays a window in its most recent size and position. The active window remains active.
SW_SHOWNORMAL Activates and displays a window. If the window is minimized or maximized, Windows restores it to its original size and position (same as SW_RESTORE).


ptMinPosition

Specifies the coordinates of the window's upper-left corner when the window is minimized.

ptMaxPosition

Specifies the coordinates of the window's upper-left corner when the window is maximized.

rcNormalPosition

Specifies the window's coordinates when the window is in the restored position.



See Also

ShowWindow, POINT, RECT

[rarratia]

Gracias amigos, esto ha sido de gran ayuda, me nace una inquietud más y tal vez la más difícil, ¿puedo asociar el evento onClose de la calculadora a un evento en delphi para que me avise cuando la ventana cierra?

[Faust]

No creo que sea tan difícil, lo malo es que no sé como, pero seguro alguien más en el foro sabrá la respuesta.

[[escafandra]]

Quizás

Saludos.