項(xiàng)目中需要獲取不同分辨率德菜單高度，必應(yīng)搜索了一下，可以用GetSystemMetrics函數(shù)實(shí)現(xiàn)，代碼如下：歡迎加入Delphi知識(shí)局QQ群:32422310

unit Unit1;interfaceusesWinapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Menus;typeTForm1 = class(TForm)MainMenu1: TMainMenu;N11: TMenuItem;N2221: TMenuItem;Button1: TButton;procedure Button1Click(Sender: TObject);private{ Private declarations }public{ Public declarations }end;varForm1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject); varMenuItemHeight:integer; beginMenuItemHeight:= GetSystemMetrics(SM_CYMENUCHECK); end;end.

如果菜單折疊，可用以下代碼：

typeTMenuBarInfo = recordcbSize: DWORD;rcBar: TRect;hMenu: HMENU;hwndMenu: HWND;fBarFocused: Byte;fFocused: Byte;end;{$EXTERNALSYM GetMenuBarInfo} function GetMenuBarInfo(hend: HWND; idObject, idItem: ULONG;var pmbi: TMenuBarInfo): BOOL; stdcall;implementationfunction GetMenuBarInfo; external user32 name 'GetMenuBarInfo';procedure TForm1.Button1Click(Sender: TObject); varMenuHeight: Integer;MenuBarInfo: TMenuBarInfo; beginMenuBarInfo.cbSize := SizeOf(MenuBarInfo);if GetMenuBarInfo(Handle, OBJID_MENU, 0, MenuBarInfo) thenMenuHeight := MenuBarInfo.rcBar.Bottom - MenuBarInfo.rcBar.Topelse......end;

或者

procedure TForm1.Button1Click(Sender: TObject);
var
? pm : TTPMParams;
? DisplayPoint : TPoint;
? r: TRect;
begin
? Systemparametersinfo( spi_getworkarea, 0, @r, 0 );
? r.top := r.bottom + 1;
? r.bottom := screen.height;

? DisplayPoint := Point( 699, r.top );
? with pm, pm.rcexclude do
? begin
? ? ?Top ? ?:= r.top;
? ? ?Bottom := r.bottom;
? ? ?Left ? := 0;
? ? ?Right ?:= screen.width;
? ? ?cbSize := SizeOf(pm);
? end;
? TrackPopupMenuEx( PopupMenu1.Handle, TPM_VERTICAL or TPM_HORIZONTAL, ?
? ? ? ? ? ? ? ? ? ? DisplayPoint.x, DisplayPoint.y, Handle, @pm );
end;

該函數(shù)也可以用于獲取屏幕分辨率

GetSystemMetrics(
?　nIndex:?Integer?{參數(shù),?詳見下表}
?):?Integer;
?
舉例?-?獲取屏幕分辨率:var
?　cx,cy:?Integer;
?begin
?　{通過?GetSystemMetrics?函數(shù)獲取屏幕分辨率}
?　cx?:=?GetSystemMetrics(SM_CXSCREEN);
?　cy?:=?GetSystemMetrics(SM_CYSCREEN);
?　ShowMessageFmt('Width:%d;?Height:%d',?[cx,cy]);
?　{通過?Screen?對象獲取屏幕分辨率}
?　cx?:=?Screen.Width;
?　cy?:=?Screen.Height;
?　ShowMessageFmt('Width:%d;?Height:%d',?[cx,cy]);
?end;

procedure TForm1.Button9Click(Sender: TObject); varframeh,captionh,menuh: Integer;str:string; begin //邊框高frameh := GetSystemMetrics(SM_CXFRAME); //標(biāo)題高captionh := GetSystemMetrics(SM_CYCAPTION); //菜單高menuh:=GetSystemMetrics(SM_CYMENU);str:= ?inttostr( frameh)+' '+inttostr(captionh)+' '+inttostr(menuh) ;memo1.text:=str;end;

?

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